A road roller takes 750 complete revolutions to move once over a level or Road find the area of the road if the diameter of a road roller is 84cm and length is 1 m
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diameter =84cm
radius=84/2=42cm
length =1m=100cm
curved surface area of the roller=2×π×r×h
=2×22/7×42×100
=26400cm^2 .
area of the road =26400×750
=19800000cm^2
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Length of roller = 1m = 100cm
Circumference of roller = π x D = 22/7 X 84 = 264 cm
Length of road = 264 x 750 = 198000 cm
Width of road = length of roller = 100 cm
Area of road = 198000 x 100 = 19,800,000 cm² or 1980 m²
hope it helps!!
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