Question

the circumference of a circular park is 660m. A 7m wide path surrounds it.Find the cost of fencing the outer boundary at the rate of rupees 60 per metre.
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Answer 1

Answer:

2πr=660

so,r=660/2π

so,r=105

so outer radius=105+7=112

so circumference=2π×112=(2×22×112)/7=704m^2

so per metre square cost Rs60

so704meter square =704×60=Rs42240