A square piece of ground is $75 m$ long. Find the cost of erecting a fence round it at $R s 4$ per meter.

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Solution

Given length of square piece = 75m
area of square piece $= (75)^{2} = 5625 m^{2}$
now cost of fencing = 4 Rs/m
Total cost of fencing = $\frac{5625}{4} = 1406.25 R s .$

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