Arithmetic Ability
Area

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Q.

The cost of fencing a square field @ Rs. 20 per metre is Rs.10.080.How much will it cost to lay a three meter wide pavement along the fencing inside the field @ Rs. 50 per sq m

View Answer

Correct choice: D

Explanation:

perimeter = total cost / cost per m = 10080 /20 = 504m side of the square = 504/4 = 126m breadth of the pavement = 3m side of inner square = 126 - 6 = 120m area of the pavement = (126 x126) - (120 x 120) = 246 x 6 sq m cost of pavement = 246*6*50 = Rs. 73800
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