Question

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 84cm and the length is 1m

Answer 1

Solution-: 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 m^{2 When we need to convert area from cm^2 to m^2 we will divide by 10000. Area we got is = 198000/10000=19.8m^2}