a road roller takes 750complete revolution to moves once over to level a road find the area of the road if the diameter of the road roller is 84 cm and length is 1 one meter
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length= height of road roller=1m=100cm
d=84cm
r=42cm
Area of road=750×lateral surface area of road roller
=750×2πrh
=750×2×22/7×42×1oo
=19800000 cm2
=1980m2
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