a road roaler takes 750 complete revolutions to move once over to level a road.Find the area of the road if the diameter of road is 84cm and length is 1m
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Answer 1980m^2
explain
A road roller is cyclindrical in shape, hence one revolution is equal to the curved surface area of cylinder.
1 revolution = 2πrh
r = 84/2cm
=42 cm
h = 1m = 100cm
CSA=2 × 22/7 × 42× 100
= 26400 cm^2cm
750 revolutions of road roller completely level a road.
Area covered by road roller =
750×26,400cm^2
= 19800000cm^2
convert cm ^2 to m^2
= 1980 m^2
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