GetStudySolution
Getstudysolution is an online educational platform that allows students to access quality educational services and study materials at no cost.
NCERT Solutions for class 4 Maths chapter 8 – Carts And Wheels
Back Exercise
Page No 82:
Question 1:
Take a wire and make a bangle for yourself. Can your teacher wear this bangle? __________
Answer:
Disclaimer: The answer may vary from student to student. It is highly recommended that students prepare the answer on their own.
Question 2:
A bangle can be used to trace a circle. What are the other things around you that you can use to trace a circle? ________ _________ _________ _________ ________ _________ _________ _________
Answer:
Other things that can be used to trace a circle are coin, bottle cap, pen cap, plate, etc.
Disclaimer: The purpose of this section is to make the students observe their surroundings. The answer may vary from student to student based on his/her experience. The answer provided here is for reference only.
Question 3:
Trace a circle with the help of some of these in your notebook or on the ground. Which thing makes the smallest circle? Which thing makes the biggest circle?
Answer:
The smallest circle can be made with the help of a pen cap. The biggest circle can be made with the help of a round plate in which we eat.
Disclaimer: The answer may vary from student to student based on his/her experience. The answer provided here is for reference only.
Page No 83:
Question 1:
Think of some other games you play by making circles.
Answer:
Dog in the bone and truth and dare are two games that we play by making circles.
Disclaimer: The answer may vary from student to student based on his/her experience. The answer provided here are for reference only.
Page No 84:
Question 1:
• Is any of these a good drawing of a circle? Discuss. • Can you draw a circle on the floor with a chalk? Try. • Also draw a circle in your notebook using a pencil. • Look at the circles drawn by your friends. Who has drawn the best circle?
Answer:
• Yes, the circle drawn by Chippu is good. • Yes, we can draw a circle on the floor with a chalk.
Disclaimer: The answer may vary from student to student based on his/her experience. The answer provided here is for reference only.
Page No 85:
Question 1:
• Do the activity in small groups. Each group should take a rope of a different length. See the circles made by different groups. • Which group made the smallest circle? __________ How long was their rope? _________ • Does a longer rope make a bigger circle? _________ Can you say why?
Answer:
Disclaimer: The answer may vary from student to student. It is highly recommended that students prepare the answer on their own.
Question 2:
The length of rope used is equal to the length of the radius of the circle.
• What was the radius of the smallest circle? _____________
Answer:
Disclaimer: The answer may vary from student to student. It is highly recommended that students prepare the answer on their own.
Page No 86:
Question 1:
Draw the radius of this bangle using a ruler. Measure the length of the radius. .png)
Answer:
The radius of the bangle is 2 cm.
Question 2:
• Draw the radius of these circles.
Guess which circle has the longer radius. 
Measure the radius of both the circles using a ruler. Write the length of their radius. • Radius of the green circle __________ • Radius of the blue circle __________
Answer:
The blue circle has a larger radius as compared to the green circle.
• Radius of the green circle 1 cm • Radius of the blue circle 1.5 cm
Question 3:
Find out • Measure the radius of the wheels of a bicycle or a bullock-cart. You can use a thread or a measuring tape. Are all the wheels of a bicycle or a bullock cart of the same radius? _________ • Have you seen a tractor or a road roller? • Which is the biggest wheel you have ever seen? • Are all wheels of a tractor or road roller of the same radius? • Lali and Kali are tied to a pole with ropes. Kali has a longer rope. Who can look for more grass to eat? _________
Answer:
- All the wheels of a bicycle or a bullock cart are not of the same radius. They have different radius depending upon the size of the bicycle or the bullock cart.
- Kali will get more grass to eat as Kali is tied to a longer rope.
Disclaimer: The answer may vary from student to student based on his/her experience. The answer provided here is for reference only.
Page No 88:
Question 1:
• Is this circle better than the one you made earlier without a compass? Draw the radius of this circle and measure it.
• Now you can make your own designs like Daljeet had made. How many did you make?
Guess how this design has been made. Use a compass to make a similar one in the box. 
Answer:
Disclaimer: The answer may vary from student to student based on his/her observation. It is highly recommended that students prepare the answer on their own.
Page No 89:
Question 1:
Guess • Why did Naina get such a drawing? Discuss. • Can a circle have more than one centre?
Answer:
• Naina got such a drawing because she had changed the centre of the circle. • No, a circle cannot have more than one centre.
Question 2:
Guess • Did any one of you ever get a shape like Naina’s?
.png)
Answer:
Disclaimer: The answer may vary from student to student based on his/her observation. It is highly recommended that students prepare the answer on their own.
Page No 91:
Question 1:
Now you trace a circle on a paper using a bangle. Cut it. Then find its centre like Sameena did.
Answer:
Disclaimer: The purpose of this section is to make the students understand the concept of radius. The answer may vary from student to student based on his/her observation. It is highly recommended that the students prepare the answer on their own.
Question 2:
We can also make the design on page 88 like this. How did you do it?
Answer:
Page No 93:
Question 1:
Guess • Whose top will not spin at all? ________ • Whose top will spin a little? ________ • Whose top will spin the best? _______ • In whose top is the stick nearest to the centre? ________
Answer:
• Zakir’s and Naina’s tops will not spin at all. • Guddo’s top will spin a little. • Appu’s top will spin the best. • In Appu’s top, the stick is nearest to the centre.
Question 2:
To make the top spin well, where will you make the hole?
Answer:
To make the top spin well, we will make the hole in its centre.