What will be the cost of house to decorate which area equal to 324 sq ft, if the price per foot of building is Rs. 10?  Select
A) 120 B) 240 C) 360 D) 720 E) 860
Let the side of the square plot be a ft.   a2 = 324 =&gt; a = 18   Length of the fence = Perimeter of the plot = 4a = 72 ft.   Cost of building the fence = 72 * 10   = Rs.720.   Answer: 720
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What will be the cost of house to decorate which area equal to 324 sq ft, if the price per foot of building is Rs. 10?