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 a road roller is 84 cm and length is 1m.

Answer 1

Diameter of the roller = 84cm
thus its radius = 42 cm
length of the roller = 100cm

.: n x csa of roller = area of road levelled
=> 750 x 2 pi r h = area of road levelled
= 1500 x 22/7 x 42 x 100 = 150000 x 22 x 6
= 19800000 cm^2
= 1980 m^2

.: area of road levelled = 1980 m^2

Answer 2

Answer:

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