Question

4. 2 m long road roller covers 17.6 m distance
during one revolution. Find its curved
surface area.​

Answer 1

Answer:

C.S.A=22/7×21/15×44/5=116.16

Answer 2

The curved surface area of the road roller is 35.2 m

The curved surface is given as 2ПrL.

We know, 2Пr is nothing but the circumference, and circumference is equal to the distance covered by the road roller in one revolution.

Given, the circumference is equal to 17.6 m,

and the length of the roller L = 2m

So, putting their respective values, we get the curved surface area as:

(17.6×2) m

= 35.2 m

This is the required answer.