3. The radius of a road roller is 84 cm and its length is 1.4 m. How much area of
the ground will it press in 500 revolutions?
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Answer:
how much area = 500 X CSA of cylinder
CSA of cylinder = 2πrh
2xπx84x140= 73920 cms
area ground will press = 500x73920=369600 metre sq
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