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The diameter of a road roller is 140cm and its length is 2.2m. It takes 400 complete revolutions to move over to level a stretch of a road 2.2m wide find the surface area of stretch of road leveled in m sq.
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one sec
The area of each circle is A = πr2. The area of the rectangle is A = πdh.
but roller is in shape of cylinder
yes
so how to solve it
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It should have the radius
diamter / 2 = radius
here radius = 0.7m
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