Students often refer to Maths Mela Class 4 Solutions Chapter 6 Measuring Length Question Answer NCERT Solutions to verify their answers.
Class 4 Maths Chapter 6 Measuring Length Question Answer Solutions
Measuring Length Class 4 Maths Solutions
Class 4 Maths Chapter 6 Solutions
Let Us Observe (Page 80)
Question 1.
Look 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 [ ]
Answer:
(a) length (✓)
(b) height (✓)
(c) weight (✓)
(f) temperature (✓)
Question 2.
What is being used to measure the height? What other tools can be used to measure height?
Answer:
Metre scale is being used to measure height. Measuring tape and ruler can also be used to measure the same.
Question 3.
Recall 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.
Answer:
(a) The height of most of the students in my grade is more than a metre. – Correct
(b) The length of my arm is less than a metre. – Correct
(c) The height of the door of the grade is less than a metre. – Incorrect
(d) The breadth of the blackboard is more than a metre. – Correct
Let Us Do (Pages 81-82)
Use your ropes to carry out the following activities. You can use a combination of ropes, if needed.
Question 1.
Walk, 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:
Do yourself.
Question 2.
Long 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.
Answer:
Reya jumped the longest distance and Sonam jumped the shortest distance.
Question 3.
Estimate how long and broad is your classroom. Measure and check.
Answer:
Do yourself.
Let Us Think: Guess the Length (Page 83)
Look at the pictures carefully and answer the questions.
Question 1.
What is the length of one bus in metres? What is the length of one cricket bat in metres?
Answer:
1 bus = 15 metres and 1 cricket bat = 1 metre.
Question 2.
How many buses would be equal to the length of two blue whales?
Answer:
4 buses.
Question 3.
How many cricket bats will be needed to measure one whale?
Answer:
30 cricket bats.
Question 4.
If two ostriches stand one above another, their height will be equal to the height of _______ .
Answer:
1 giraffe.
Question 5.
How many crocodiles will be equal to the length of a blue whale?
Answer:
5 crocodiles.
Let Us Observe (Page 84)
Question
\(\frac{1}{2}\)m = _______ cm, \(\frac{1}{4}\) m = _______ cm
Answer:
\(\frac{1}{2}\) m = 50 cm, \(\frac{1}{4}\) m = 25 cm.
Let Us Do (Page 85)
Question 1.
Measure each object using a scale.
Write the names of the objects in increasing order of length.
Answer:
Eraser = 4 cm, Pencil = 10 cm, Comb = 10 cm, Box = 11 cm.
Question 2.
Estimate 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.
Answer:
Question 3.
Take 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.
Answer:
Question 4.
Find 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.
Question 5.
Trace your hand on a piece of paper. Measure it using the scale.
Length of my hand = _______ cm
Answer:
Do yourself.
Question 6.
Use your hand to estimate the measurement of any object. Convert into centimetres. Verify using the scale.
Answer:
Question 7.
Ashwin’s scale is broken. Can you help him to measure using this scale?
Answer:
(a) 14-8 = 6 cm
(b) 16-12 = 4 cm
Question 8.
Fill the blanks on the number line below appropriately.
Answer:
25 cm = \(\frac{1}{4}\) m, \(\frac{1}{2}\) m = 50 cm, \(\frac{3}{4}\) m = 75 cm.
Question 9.
The 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.
Let Us Do (Page 90)
Question 1.
The 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 = 800 cm
Answer:
(ii) 4 m = 400 cm
(iii) 6 m = 600 cm
(iv) 8 m = 800 cm
(b) Identify the wells with the same depth and match them.
Answer:
Fencing and Lacing (Page 91)
Bhola 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:
28 bricks.
Let Us Do (Pages 92-94)
Question 1.
Bhola made the boundary of his gardens in the following ways. Circle the boundary that is longest.
Answer:
Third figure.
Question 2.
Let us find the perimeter of some shapes using the dot grid. One is done for you.
(a) Colour the boundary with the longest length in blue.
Answer:
Colour the boundary of this figure with longest length in blue. Perimeter = 18 cm
(b) Colour the boundary with the shortest length in green.
Answer:
Colour the boundary of this figure with shortest length in green.
Perimeter = 8 cm
(c) Tick the shapes with the same length.
Answer:
Following figures have same length. Perimeter = 10 cm.
Question 3.
Do any of the following shapes have the same perimeter? Tick them.
Answer:
A. Perimeter = 12 cm
B. Perimeter = 10 cm
C. Perimeter = 12 cm
D. Perimeter = 14 cm
E. Perimeter = 13 cm
F. Perimeter = 14 cm
D and F have same perimeter; A and C also have same perimeter.
Question 4.
Tick the garden with the minimum perimeter.
Answer:
Garden A = 18 cm, Garden B = 24 cm and Garden C = 20 cm. Garden A has minimum perimeter.
Question 5.
Estimate and measure the perimeters of shapes around you using a scale and write them in the space given below.
Answer:
Question 6.
Draw three different shapes with perimeter of 20 cm.
Answer:
Three different shapes with perimeter of 20 cm.
