a road roller takes 750 complete revolutions to move once over the level a road. find the area of the road if the diameter of a road roller is 84 cm and lenght is 1m.
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area of roller =pie*r2h
as r=84/2=42cm
and h =1m=100cm
therefore area=22/7*42*100
=22×6×100
=132*100
=13200cm2 or 1.32m2
now as it takes 750 complete rounds
1.32*750 = 990 m2
thus, area of the road is 990m2
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