a road roller takes hundred complete revolutions to move once over to level a road. find the area of the road if diameter is 84cm and length is 18cm
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Answer:
475200 cm²
Step-by-step explanation:
DIAMETER= 84 CM
Radius = r= 84÷2= 42 cm
Length of Road roller = h= 18 cm.
Distance covered by road roller in one revolution =
curved surface area of cylindrical road roller = 2πrh
= 2. 22/7 . 42 .18
= 4752 cm²
Becoz ,road roller takes 100 complete revolutions to level the road,
Area of road = 100×4752= 475200 cm²
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