Math, asked by india560, 1 year ago

the inner circumtances of a circular track is 132m and the track is7 m uniformlywide.calculate the cost of levelling the track at 32 paise per sq. m

Answers

Answered by sciencemathsharsh
2
circumference=2πr
132=2*22/7*r
132*7/44=r
r=21m
outer radius=21+7=28m
area of path=π(R+r)(R-r)
=22/7*(28+21)(28-21)
=22/7*49*7
=1078m²
cost of levelling the track=1078*0.32=Rs.344.96
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