A roller takes 750 complete revolutions to move once over a level of road. Find the area of road if the diameter of the roller is 84 cm and length is 1 m.
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Answered by
5
may this helps you
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Answered by
11
Step-by-step explanation:
Diameter = 84cm
Radius = D/2 = 84/2 = 42cm
Height (length) = 1m = 100cm
Curved surface area of road roller = 2x2/7x42x100 = 26400cm square units
Area of road = Curved surface
Area of road roller x number of revolution
= 26400 x 750 = 19800000cm^2
In m^2 = 1980m^2
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