Question

A road 3.5m wide surrounds a circular plot whose circumference is 44m .find the cost of paving the road at rs 20per m2( take 22/7

Answer 1

circumference of the circular plot=44m
44=2πr
radius=7m
radius of the road =(7+3.5)m
radius=10.5m
area=πr^2
area =154m^2
cost of paving the road=154*20
cost=3080Rs

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