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NCERT Solutions for Class 4 Maths Chapter 6 Measuring Length (PDF) – 2027

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NCERT Solutions for Class 4 Maths Chapter 6 Measuring Length – step-by-step answers to every exercise and in-text question of the chapter, as per the latest NCERT syllabus for 2027. Read them online or download the free question-answer PDF.

In this chapter we measure length with rope, tape and scale. We meet the centimetre, learn that 1 m = 100 cm, and find the perimeter — the length all around a shape.

NCERT Solutions for Class 4 Maths Chapter 6 Measuring Length PDF

All the answers are on this page below. The PDF also explains every answer – why it is right and how to check it – so download it for revision.

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NCERT Solutions for Class 4 Maths Chapter 6 Measuring Length – Questions and Answers

All 49 questions of the chapter (textbook pages 80 – 94) are answered below, in the order of the book – in-text questions, activities and the end-of-chapter exercises. Each answer is written the way you would write it in the exam.

Let Us Observe — Page 80Measuring Length

Q1Look at the picture. What are the students measuring? Put a tick mark (✓) if you find it being measured.
a) Length   b) Height   c) Weight
d) Depth   e) Breadth   f) Temperature
What the picture in your book shows.
Answer

Tick b) Height and c) Weight.

WhatTickWho is doing it in the picture
a) Length✘Nobody is measuring a length lying flat
b) Height✔The boy standing against the marked strip on the wall
c) Weight✔The girl standing on the machine with a cord
d) Depth✘Nothing deep, like a well, is being measured
e) Breadth✘Nobody is measuring how wide something is
f) Temperature✘No thermometer is being used. The doctor is only looking inside the mouth
Q2What is being used to measure the height? What other tools can be used to measure height?
What the picture in your book shows.
Answer

A height scale (a long marked strip) fixed to the wall is being used.

Other tools we can use to measure height:

  • a measuring tape, like the one a tailor uses;
  • a 1 metre rope that we made ourselves;
  • a metre scale or a long ruler;
  • a stick with marks on it, held straight against the wall.
Q3Recall in Grade 3 you studied that lengths are measured in metres. Check and fill in the blanks whether the following are correct/incorrect for your classroom. a) The height of most of the students in my grade is more than a metre. _______________
Answer

Correct.

1 m = 100 cm
Height of most Grade 4 children = about 120 cm to 140 cm
120 cm is more than 100 cm → more than 1 m
Q4b) The length of my arm is less than a metre. _______________
Answer

Correct.

Length of my arm = about 55 cm
55 cm is less than 100 cm → less than 1 m
Q5c) The height of the door of the grade is less than a metre. __________
Answer

Incorrect.

Height of the classroom door = about 2 m
2 m = 200 cm, and 200 cm is more than 100 cm
So the door is more than a metre, not less
Q6d) The breadth of the blackboard is more than a metre.___________
Answer

Correct.

Breadth (the side-to-side length) of the blackboard = about 2 m
2 m = 200 cm, which is more than 100 cm → more than 1 m

Let Us Do — Page 81Measuring is Fun

Q1Remember we made, 1 metre (m), half metre (1/2 m), and quarter metre (1/4 m) ropes. Let us make them again. Do you notice 1 m = 1/2 m + 1/2 m and 1 m = 1/4 m + 1/4 m + 1/4 m + 1/4 m and 1/2 m = 1/4 m + 1/4 m.
Answer

Yes, we notice all three facts:

1 m = 1/2 m + 1/2 m
1 m = 1/4 m + 1/4 m + 1/4 m + 1/4 m
1/2 m = 1/4 m + 1/4 m
1 m1/2 m1/2 m1/4 m1/4 m1/4 m1/4 m
One metre rope, two half-metre ropes and four quarter-metre ropes, all laid one below the other.
Q2Walk, Jump, and Crawl on 1, 5 and 10 m line. Draw lines of 1 m, 5 m, and 10 m on the floor of the classroom or outside in the playground. How will you make these lines? Think and share with your friends. Walk, jump, and crawl on the lines.
Answer

We draw a chalk line along the 1 m rope. For the 5 m line we place the rope 5 times, end to end, in a straight line; for the 10 m line, 10 times.

5 m = 1 m + 1 m + 1 m + 1 m + 1 m
10 m = the 1 m rope placed 10 times

Let Us Do — Page 82Measuring is Fun (Long Jump)

Q1Long Jump. Each child can participate in a long jump competition. How far have your friends jumped? Measure as accurately as possible using a combination of ropes. Who jumped the longest distance? Fill the following table.
Name of the studentLess than 1 m1 mMore than 1 mActual measurement
     
     
     
Answer

(your class will have its own names and numbers):

Name of the studentLess than 1 m1 mMore than 1 mActual measurement
Rani✔3/4 m
Bhola✔1 m 25 cm
Mini✔1 m
Jagat✔1 m 50 cm

The longest jump is Jagat's, 1 m 50 cm.

Q2Who has jumped the shortest?
Answer

Rani jumped the shortest, 3/4 m (75 cm).

3/4 m = 75 cm
1 m = 100 cm    1 m 25 cm = 125 cm    1 m 50 cm = 150 cm
The smallest number is 75 cm
Q3Estimate how long and broad is your classroom. Measure and check.
Answer
My estimateActual measurement
Length of my classroom8 m7 m 50 cm
Breadth of my classroom6 m6 m 25 cm

Let Us Think: Guess the Length — Page 83Measuring is Fun

Q1What is the length of one bus in metres? What is the length of one cricket bat in metres?
Length about 30 metres4 m3 mLength about 6 metres
The pictures on page 83: a blue whale with two buses below it, a giraffe in a barrel, an ostrich and a crocodile with cricket bats below it.
Answer

One bus is about 15 m long. One cricket bat is about 1 m long.

2 buses = 30 m, so 1 bus = 15 m (15 + 15 = 30)
The 6 m crocodile is as long as 6 cricket bats, so 1 bat = 1 m
Q2How many buses would be equal to the length of two blue whales?
Length about 30 metres4 m3 mLength about 6 metres
The pictures on page 83: a blue whale with two buses below it, a giraffe in a barrel, an ostrich and a crocodile with cricket bats below it.
Answer

4 buses.

One whale = 30 m, so two whales = 30 + 30 = 60 m
One bus = 15 m
15 + 15 = 30 → 2 buses make one whale
15 + 15 + 15 + 15 = 60 → 4 buses make two whales
Q3How many cricket bats will be needed to measure one whale?
Length about 30 metres4 m3 mLength about 6 metres
The pictures on page 83: a blue whale with two buses below it, a giraffe in a barrel, an ostrich and a crocodile with cricket bats below it.
Answer

30 cricket bats.

One cricket bat = 1 m
One whale = 30 m
1 m laid down 30 times = 30 m
So we need 30 bats
Q4If two ostriches stand one above another, their height will be equal to the height of ______________.
Length about 30 metres4 m3 mLength about 6 metres
The pictures on page 83: a blue whale with two buses below it, a giraffe in a barrel, an ostrich and a crocodile with cricket bats below it.
Answer

6 m — the height of the giraffe (and the length of the crocodile, which is also 6 m).

One ostrich = 3 m
Two ostriches, one above the other = 3 m + 3 m = 6 m
Giraffe: the tub is 4 m, and its neck and head stick out about 2 m more → about 6 m
Q5How many crocodiles will be equal to the length of a blue whale?
Length about 30 metres4 m3 mLength about 6 metres
The pictures on page 83: a blue whale with two buses below it, a giraffe in a barrel, an ostrich and a crocodile with cricket bats below it.
Answer

5 crocodiles.

One crocodile = 6 m, one whale = 30 m
6, 12, 18, 24, 30
That is 6 counted 5 times
So 5 crocodiles are as long as one blue whale

Let Us Observe — Page 84Measuring Small Things

Q1Can you think how to measure a small thing like an eraser or a rice grain?
Answer

Yes. We use a smaller unit called the centimetre (cm), and a scale.

1 metre (m) = 100 centimetre (cm)
Q2Compare the metre rope with the measuring tape used by a tailor. Is the length of both the same or different?
Answer

Their length is the same. Both are 1 m long.

Metre rope = 1 m
Tailor's measuring tape = 1 m = 100 cm
metre ropetailor’s measuring tapeboth are 1 m long
The 1 m rope and the tailor’s tape laid one below the other.
Q3Observe the measuring tape carefully. What do you notice?
012345678910each red bar = 1 cm
The measuring tape on page 84, with its marks, numbers and red bars.
Answer

These are the things we notice on the tape:

  • The tape has equal marks with the numbers 0, 1, 2, 3 … beside them.
  • Counting starts at 0, not at 1.
  • The gap between two marks next to each other is 1 cm. One red bar is 1 cm.
  • 10 such gaps make 10 cm, and 100 of them make 1 m.
Q4Discuss how these marks help us measure clearly.
Answer

The marks help us in three ways:

  • They cut the tape into equal pieces of 1 cm, so everyone gets the same answer.
  • We do not have to count the pieces one by one. The number beside the mark tells us how many centimetres we have already covered.
  • They let us say a length exactly — 7 cm, not just “a little less than my hand”.
Q51/2 m = _____ cm, 1/4 m = _____ cm
Answer

1/2 m = 50 cm and 1/4 m = 25 cm.

1 m = 100 cm
50 cm + 50 cm = 100 cm, so 1/2 m = 50 cm
25 cm + 25 cm + 25 cm + 25 cm = 100 cm, so 1/4 m = 25 cm

Let Us Do — Pages 85 to 89Measuring Small Things

Q1Measure each object using a scale.
eraser: ______ cmpencil: ______ cmcomb: ______ cmtall green carton (along the dotted edge): ______ cm
The four objects on page 85, drawn one below the other (the tall carton is drawn lying down). Measure them on the page of your book.
Answer

Measured on the page of the book:

ObjectLength
Eraser4 cm
Pencil10 cm
Comb10 cm
Tall green carton11 cm
0123456789101112eraser — 4 cmpencil — 10 cmcomb — 10 cmtall green carton (measured along the dotted edge) — 11 cm
The four objects on page 85 laid against a centimetre scale.
Q2Write the names of the objects in increasing order of length.
Answer

Eraser (4 cm), pencil (10 cm), comb (10 cm), tall green carton (11 cm). The pencil and the comb are both 10 cm, so they may be written in either order.

EraserPencilCombTall green carton
4 cm10 cm10 cm11 cm
Q3Estimate the lengths of the following and compare your responses with your friends, in the grade. Write some examples of things that can be lesser than or equal to 1 cm in length. Verify by measuring.
Length of itemsEqual to 1 cmMore than 1 cm Less than 1 cmActual measurement
A fingernail    
An eraser    
An ant    
A grain of wheat    
A rajma seed    
Answer

(first tick your guess, then measure and fill the last column):

Length of itemsEqual to 1 cmMore than 1 cm Less than 1 cmActual measurement
A fingernail✔about 1 cm
An eraser✔about 4 cm
An ant✔less than 1 cm
A grain of wheat✔less than 1 cm
A rajma seed✔about 2 cm

Things that are 1 cm long or shorter: a grain of rice, a mustard seed, a small shirt button, a chalk piece that is nearly finished, the head of a matchstick, a small bead.

Q4Take three toy cars and find out how far each one can go. You can use a small wooden ramp, or you might like to make a ramp using any material that you have. Measure the distance each of your cars travels using measuring tape and write the answers in cm.
CarDistance from the rampRank
Car 1_______ cm 
Car 2_______ cm 
Car 3_______ cm 
Answer
CarDistance from the rampRank
Car 185 cm2
Car 2120 cm1
Car 360 cm3
120 is the biggest, then 85, then 60
So Car 2 wins, Car 1 is second and Car 3 is third
Q5Find the longest and the shortest route in this treasure hunt. You can go around the obstacles but cannot jump over them. You can only walk on the yellow tiles and not on the grass. Can you find the length of your route in centimetres? Look for the 1 cm clue in the map.
1 cm1 cmSTART
The treasure-hunt map from page 87. The yellow squares are the tiles you may walk on, the green is grass, and the four coloured circles are the obstacles — the octopus, the lion, the hippo and the snake. The small red square is the 1 cm clue.
Answer

Count the 1 cm squares along your route. Each square of the map is 1 cm, so the number of squares you walk on is the length of your route in cm. The shortest route uses the fewest squares; the longest route uses the most.

Q6Trace your hand on a piece of paper. Measure it using the scale. Length of my hand = ________ cm
Answer

Place the 0 of the scale on the wrist line of the traced hand and read the mark at the tip of the longest finger.

Sample answer: Length of my hand = 14 cm.

012345678910cm
The traced hand measured against the scale, from the wrist line to the finger tip.
Q7Use your hand to estimate the measurement of any object. Convert into centimetres. Verify using the scale.
ObjectNumber of handsEstimate using hand Actual measure using the cm scale
1. Length of my textbook _______ cm_______ cm
2. Height of my chair _______ cm_______ cm
3. Width of my desk _______ cm_______ cm
4. Height of a flowerpot _______ cm_______ cm
Answer

(taking my hand as 14 cm long):

ObjectNumber of handsEstimate using hand Actual measure using the cm scale
1. Length of my textbook214 + 14 = 28 cm26 cm
2. Height of my chair314 + 14 + 14 = 42 cm44 cm
3. Width of my desk414 + 14 + 14 + 14 = 56 cm55 cm
4. Height of a flowerpot114 cm15 cm
Q8Ashwin’s scale is broken. Can you help him to measure using this scale?
891011121314161514131211
Ashwin’s two broken scales from page 88, with a card placed along each one.
Answer

Yes. Read the marks at both ends of the card and subtract.

First card: its ends are at 8 and 14. Length = 14 − 8 = 6 cm.

Second card: its ends are at 16 and 12. Length = 16 − 12 = 4 cm.

Q9Fill the blanks on the number line below appropriately.
0cm10cm20cm30cm40cm__ cm60cm70cm80cm90cm100cm25cm__ cm0 m__ m1/2 m3/4 m1 m
The number line on page 89, with three empty boxes.
Answer

The three blanks are 50 cm, 75 cm and 1/4 m.

0cm10cm20cm30cm40cm50cm60cm70cm80cm90cm100cm25cm75cm0 m1/4 m1/2 m3/4 m1 m
The same number line with the three boxes filled in.
Q10The length of a board is 2 metres. Sonu has a decorative border sticker which is 20 cm long. How many such stickers are needed to cover the length of the board completely?
Answer

10 stickers.

2 m = 100 cm + 100 cm = 200 cm
Skip-count by 20: 20, 40, 60, 80, 100, 120, 140, 160, 180, 200 → 10 stickers
1234567891020 cm0 m1 m2 m
Ten stickers of 20 cm each, laid end to end along the 2 m board.

Metre and Centimetres — Page 89Metre and Centimetres

Q1Ramu and Shamu are using a measuring tape to measure their own height. Ramu reads his height from the tape as 120 cm and Shamu reads it as 1 m 20 cm. Who is correct?
Answer

Both are correct. Pinki is right.

120 cm = 100 cm + 20 cm
100 cm = 1 m
So 120 cm = 1 m + 20 cm = 1 m 20 cm
100 cm20 cm1 m20 cm
Pinki’s drawing: the same height written in two ways, one below the other.

Let Us Do — Page 90Metre and Centimetres

Q1The Village Sarpanch got the depth of some wells in his village measured by two different people.
a) Fill the blanks such that the depths are the same.
i) 2 m = 200 cm
ii) __ m = 400 cm
iii) 6 m = ____cm
iv) __ m = 800m
Answer

ii) 4 m = 400 cm   iii) 6 m = 600 cm   iv) 8 m = 800 cm

The rule we use every time is 1 m = 100 cm.

Depth in metresSame depth in centimetres
2 m200 cm
4 m400 cm
6 m600 cm
8 m800 cm
Q2b) Identify the wells with the same depth and match them.
Depth in m and cmDepth in cm
1 m 40 cm550 cm
4 m 60 cm140 cm
2 m 30 cm460 cm
5 m 50 cm230 cm
Answer
1 m 40 cm = 100 + 40 = 140 cm
4 m 60 cm = 400 + 60 = 460 cm
2 m 30 cm = 200 + 30 = 230 cm
5 m 50 cm = 500 + 50 = 550 cm
Well measured by the first personMatches Well measured by the second person
1 m 40 cm→140 cm
4 m 60 cm→460 cm
2 m 30 cm→230 cm
5 m 50 cm→550 cm

Let Us Explore — Pages 90 to 91Metre and Centimetres

Q1Activity: Students will measure their height using a measuring tape. Make a table in your notebook and complete it.
Answer

(your class will have its own names and numbers):

Name of the StudentHeight in cmHeight in m
Aarav132 cm1 m 32 cm
Bhavya128 cm1 m 28 cm
Chetan141 cm1 m 41 cm
Divya98 cmless than 1 m
Eshan125 cm1 m 25 cm
Q2Height of the tallest child is _____.
Answer

The tallest child is Chetan. His height is 141 cm, that is 1 m 41 cm.

98, 125, 128, 132, 141
The biggest number is 141
141 cm = 100 + 41 = 1 m 41 cm
Q3Height of the shortest child is _____.
Answer

The shortest child is Divya. Her height is 98 cm.

98, 125, 128, 132, 141
The smallest number is 98
98 cm is less than 100 cm, so it is less than 1 m
Q4Number of children who are more than 1 m tall _____.
Answer

4 children are more than 1 m tall.

132 → more than 100 ✔
128 → more than 100 ✔
141 → more than 100 ✔
98 → less than 100 ✘
125 → more than 100 ✔
Count the ticks: 1, 2, 3, 4
Q5Number of children who are shorter than 1 m _____.
Answer

1 child is shorter than 1 m.

Only 98 cm is less than 100 cm
So the count is 1

Check: 4 children taller than 1 m + 1 child shorter than 1 m = 5 children in the table ✔

Fencing and Lacing — Page 91Fencing and Lacing

Q1Bhola is making a boundary with bricks for his vegetable garden. Colour the bricks on the boundary. How many bricks will he need to make the boundary?
Answer

Colour only the bricks on the wall all round the bed. Count the bricks on each side and add them, counting each corner brick only once.

Let Us Do — Pages 92 to 94Fencing and Lacing (Perimeter)

Q1Bhola made the boundary of his gardens in the following ways. Circle the boundary that is longest.
1. plain rectangle2. corners cut off3. steps on both sides
Bhola’s three garden boundaries, drawn in bricks.
Answer

Circle the third garden (the one with steps at its corners). Its boundary is the longest, though only a little longer than garden 1. Garden 2, with its corners cut off, has the shortest boundary.

Q2Let us find the perimeter of some shapes using the dot grid. One is done for you.
ABCDE10 cm
The five shapes on the dot grid on page 92. Every dot is 1 cm from the next. Shape A is the one already done for you.
Answer

Every dot is 1 cm from the next, so count the 1 cm steps all round each shape.

ShapeWhere it isAdding the 1 cm steps Perimeter
Atop left, done for you2 + 1 + 1 + 1 + 3 + 210 cm
Blong and thin, at the top4 + 1 + 4 + 110 cm
Cthe big one on the right3 + 3 + 1 + 1 + 5 + 2 + 1 + 218 cm
Dthe square at the bottom left2 + 2 + 2 + 28 cm
Ethe tall one in the middle2 + 4 + 1 + 2 + 2 + 1 + 1 + 114 cm
Q3a) Colour the boundary with the longest length in blue.
ABCDE10 cm
The five shapes on the dot grid on page 92. Every dot is 1 cm from the next. Shape A is the one already done for you.
Answer

Colour the boundary of shape C, the big one on the right, in blue. Its perimeter is 18 cm.

ABCDE
Shape C, the longest boundary, coloured blue.
Q4b) Colour the boundary with the shortest length in green.
ABCDE10 cm
The five shapes on the dot grid on page 92. Every dot is 1 cm from the next. Shape A is the one already done for you.
Answer

Colour the boundary of shape D, the square at the bottom left, in green. Its perimeter is 8 cm.

ABCDE
Shape D, the shortest boundary, coloured green.
Q5c) Tick the shapes with the same length.
ABCDE10 cm
The five shapes on the dot grid on page 92. Every dot is 1 cm from the next. Shape A is the one already done for you.
Answer

Tick shape A and shape B. Both have a perimeter of 10 cm.

ABCDE
Shapes A and B, the two boundaries that are the same length.
Q6Do any of the following shapes have the same perimeter? Tick them.
A)B)C)D)E)F)
The six shapes A) to F) on page 93, drawn on a 1 cm dot grid.
Answer

Yes. Count the 1 cm steps round each shape on the dot grid.

Tick these:

  • A) and C) — both have a perimeter of 12 cm.
  • D), E) and F) — all three have a perimeter of 14 cm.
ShapeAdding the 1 cm stepsPerimeter
A)4 + 1 + 1 + 1 + 3 + 212 cm
B)2 + 3 + 2 + 310 cm
C)2 + 1 + 1 + 2 + 1 + 1 + 2 + 212 cm
D)4 + 3 + 4 + 314 cm
E)1 + 2 + 3 + 1 + 4 + 314 cm
F)4 + 3 + 2 + 1 + 2 + 214 cm
Q7Tick the garden with the minimum perimeter.
123
The three gardens on page 93, drawn on a 1 cm dot grid.
Answer

Tick the first garden, the plain rectangle. Its perimeter is the smallest, 18 cm.

GardenAdding the 1 cm stepsPerimeter
1 (plain rectangle)4 + 5 + 4 + 518 cm
2 (with a slot cut into the top)2 + 2 + 1 + 2 + 2 + 5 + 5 + 524 cm
3 (narrow on top, wide below)3 + 2 + 1 + 3 + 5 + 3 + 1 + 220 cm
Q8Estimate and measure the perimeters of shapes around you using a scale and write them in the space given below.
S. No.ObjectEstimated perimeter in cm/mActual measure in cm/m
1.Desk  
2.Blackboard  
3.Classroom floor  
4.   
5.   
6.   
Answer

(your classroom will give its own numbers):

S. No.ObjectEstimated perimeter Actual measureHow it was added
1.Desk200 cm200 cm60 + 40 + 60 + 40
2.Blackboard600 cm590 cm200 + 95 + 200 + 95
3.Classroom floor30 m28 m8 + 6 + 8 + 6
4.My notebook80 cm86 cm25 + 18 + 25 + 18
5.Classroom door600 cm580 cm200 + 90 + 200 + 90
6.Window400 cm440 cm120 + 100 + 120 + 100
Q9Draw three different shapes with perimeter of 20 cm.
Answer

On a 1 cm dot grid, draw shapes whose 1 cm steps add up to 20.

20 cm20 cm20 cm
Three different shapes drawn on a 1 cm dot grid, each with a perimeter of 20 cm.
ShapeAdding the sidesPerimeter
A rectangle 6 cm by 4 cm6 + 4 + 6 + 420 cm
A rectangle 7 cm by 3 cm7 + 3 + 7 + 320 cm
An L shape4 + 2 + 2 + 2 + 6 + 420 cm

You could also draw a square of side 5 cm, because 5 + 5 + 5 + 5 = 20.

Chapter 6 of 14 – Maths

Also for This Chapter

NCERT Solutions Class 4 Maths Chapter 6 Measuring Length – Overview

ClassClass 4
SubjectMaths
Chapter6 – Measuring Length
Textbook pages80 – 94
Questions solved49
Session2027
FormatFull answers on this page + PDF

NCERT Solutions Class 4 Maths Chapter 6 – FAQs

Where can I download NCERT Solutions Class 4 Maths Chapter 6 Measuring Length PDF?

Read every answer on this page, or download the free PDF from the table at the top.

Is this for the 2027 session?

Yes, it follows the latest NCERT Class 4 Maths book for 2027.

How many questions are solved in NCERT Class 4 Maths Chapter 6?

All 49 questions of the chapter (textbook pages 80 – 94) – the in-text questions, activities and the end-of-chapter exercises.

How should I use these solutions?

Read the chapter in the NCERT book first, attempt the questions yourself, then check your answers here.

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