15. A road roller takes 100 complete
revolutions to move once over to level a
road. Find the area of the road if the
diameter of the road roller is 140 cm and
length is 2 m.
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area of road = 880m^2
n=100
csa of road roller = 2πr
= 2*22/7*70/100
=4.4m^2
length of road = 4.4*100=440m
breadth of road =2m
Area of road =l*b
=440*2
=880m^2
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