Q6 of 46 Page 61

A park is in the shape of a semicircle with radius 21 m. Find the cost of fencing it at the cost of ` 5 per metre.

Given, radius = 21 m


Cost of fencing per metre = Rs.5 per metre


Perimeter of semicircle = πr + 2r



= 108 cm


Thus, Cost of fencing per = 108 × 5


= 540 cm2


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