20. The circumference of a circular park is 660 m. A 7 m wide path sur – InterviewSolution

1.	20. The circumference of a circular park is 660 m. A 7 m wide path surrounds it. Findof fencing the outer boundary at the rate of t 60 per metre.
Answer» 2πr=660so,r=660/2πso,r=105so outer radius=105+7=112so circumference=2π×112=(2×22×112)/7=704m^2so per metre square cost Rs60so704meter square =704×60=Rs42240

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