a road roller takes 750 complete revolutions to move once over a level of road. find the area of a road if the diameter of a road roller is 84cm and its length is 1m
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Answer:
1980 cm²
Step-by-step explanation:
Length of roller = h= 1 meter
Diameter of the roller = 84 centimetre
Radius of roller = 84/2 cm
= 42 cm
= 42 /100 m
Given -
The roller takes 750 complete revolutions to level the whole road
Area of road =750* Area covered in 1 revolution
= 750 * lateral surface area of cylinder
= 750 * 2 pie rh
= 750 * 2 * 22/7 * 42/100 * 1
= 750 * 2 * 22 * 6/100 * 1
= 1500*132/100
= 15 * 132
= 1980 m²
Hope this helps....
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