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2015-02-07T13:34:08+05:30

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Area of square = 1600 m²
length of side, l = √1600 = 40m
so diameter of semicircles = length of side of square = 40m
radius, r = 40/2 = 20m
Area of one semicircle =  \frac{ \pi r^2}{2} = \frac{22*20^2}{7*2} =628.57\ m^2

Area of all 4 semicircles = 4×628.57 = 2514.28 m²

total area = 2514.28+1600 = 4114.28
rate = Rs. 1.25 per m²
total cost = 1.25×4114.28 = Rs. 5142.85
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