The area of a circular playground is 22176 m2. Find the cost of fencing this ground at the rate of Rs 50 per metre
NCERT Class X
Mathematics - Exemplar Problems
Chapter _AREA RELATED TO CIRCLES
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Let radius of playground be r cm
So, 22*7*r*r = 22176
or, r*r = 7056
or, r = 84
So, Perimeter of playground = 2*22/7*84 m = 528 m
Cost of fencing = Rs. 528*50 = Rs 26400
So, 22*7*r*r = 22176
or, r*r = 7056
or, r = 84
So, Perimeter of playground = 2*22/7*84 m = 528 m
Cost of fencing = Rs. 528*50 = Rs 26400
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