The length of a road roller is 2.1 nd it’s diameter is 1.4.For travelling a ground 500 rotation of the road roller were required. How much area of ground was levelled by the roller? Find the cost of levelling at the rate of Rs.7 per sq. m.
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r= 0.7m
h= 2.1m
Area = 22/7×0.7×0.7×2.1
=3.234
Area in 500 rotations= 1617m^2
Cost= 1617×7=Rs. 11319
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