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The perimeter of a rectangular plot is 340 m. Find the cost of gardening 1 m broad boundary around it at the rate of Rs 10 per sq. m.

A.Rs 3450
B.Rs 3400
C.Rs 3440
D.Rs 3880
Answer and Feedback
Answer:C
Feedback:Given 2(l+b) = 340
1 m broad boundary means increase in l and b by 2 m
So area of the boundary will be [(l+2)(b+2) – lb] = 2(l+b) + 4 = 340 + 4 = 344
So cost of gardening = 344*10 = 3440

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