Question

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

Answer 1

area of road = csa of roller x no. of revolutions
= 2πrh x 750
= 2 x 22/7 x 42 x 100 x 750
= 19800000 cm²
= 1980 m²

Answer 2

hope this helps you ......