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Area of circle=(pi) r2=7.70 sq m

r2=2.45

r=1.565

Perimeter of circle=2(pi)r

=2*3.14*1.565

=9.82

Cost of Fencing it at Rs.3.5 per meter = 9.82*3.5

=34.39(nearly)

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Q: Solution and working of -if the area of a circle is 7.70sqm find the cost of fencing it as rs 3.5 per meter?
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