Question

find the area of a field in which a road roller takes 300 complete round and road roller is 35 metre in radius

Answer 1

Diameter of the road roller = 84 cm
Radius of the road roller = 42 cm
Length of the road roller = 1 m = 100 cm

CSA of the road roller = 2πrh = 2 x 22/7 x 42 = 264 cm2
Area of the road levelled in one revolution = 264 cm2
Area of the road levelled in 750 revolutions = 264 x 750 = 198000 cm2
Area of the road = 198000 cm2 = 19.8 m2