Are all wheels of a tractor or road roller of the same radius?

One Line Answer

No, all wheels of a tractor or a road roller are not of the same radius. Their back wheels are bigger.

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Carts and Wheels

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Chapter 8: Carts and Wheels - Exercises [Page 86]

Chapter 8 Carts and Wheels
Exercises | Q 21 | Page 86

A bangle can be used to trace a circle. What are the other things around you that you can use to trace a circle?

Look at the circles drawn by your friends. Who has drawn the best circle?

Draw the radius of these circles. Guess which circle has the longer radius.

Measure the radius of both circles using a ruler.
Write the length of their radius.

Measure the radius of the wheels of a bicycle or a bullock-cart. You can use a thread or a measuring tape.

Can a circle have more than one centre?

Now you trace a circle on a paper using a bangle. Cut it. Then find its centre like Sameena did.

You also try to balance a plate or a round lid on your finger. Where does it balance?

Now everybody was excited to spin their tops which looked like this.


Zakir	Appu	Naina	Guddo

Whose top will not spin at all?

To make the top spin well, where will you make the hole?