Nets of Lateral Surface Area

Q.

A road roller takes $ 750$ complete revolutions to move once over to level a road. Find the area of the road if the diameter of a road roller is $ 84 cm$ and the length $ 1 m.$

Q.

The diameter of a road roller is 40 cm. It is 70 cm long. What is the area of levelled surface, when it rolls once?

1. $2200{\text{cm}}^2$

2. $17600{\text{cm}}^2$

3. $4400{\text{cm}}^2$

4. $8800{\text{cm}}^2$