Question 136

What would be the cost of building a fence around a square plot with area equal to 361 sq. ft. if the price per foot of building the fence is Rs. 62 ?

Solution

Let side of square plot = $$s$$ ft

=> Area = $$s^2 = 361$$

=> $$s = \sqrt{361} = 19$$ ft

Perimeter of square plot = $$4 s = 4 \times 19 = 76$$ ft

Cost of building fence per foot = Rs. 62

$$\therefore$$ Cost of building fence around the plot = $$76 \times 62 = Rs. 4712$$

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