Question

A 7 meter wide path runs outside a circular park of Etalgacha Friends association club along perimeter. Let us write by calculating the area of path, if the perimeter of circular park is 352 meter, let us write by calculating how much cost for concreting the path at the rate of 20 per square meter.​

Answer 1

Answer:

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Answer 2

Answer:

this is like circle within circle having same center.

Ler circular park has Radius = r

so r= (352*7) /(2*22)=56m

Let R be Radius of outer circle

such that R-r=7 means R=63m

Now area of the path having Radius R = (22/7)(R^2-r^2)=(22/7)(R+r)(R-r)

= (22/7) 63+56)(7)=22*119 sq.m

Now cost= 20* 22*119 Rs