Question

The diameter of a road roller is 84cm and its length is 120cm. It takes 500 complete revolutions to move once over to level a playground. Find the area of the playground in m2.

Answer 1

the CSA of a cylinder=2*pi*r*h
here,
2*22/7*42*120=44*6*120=31680
the no.of revolutions taken to level the playground once=500
therefore Ar. of the playground=500*31680=15840000cm^2 /1584 m^2

Answer 2

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