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Question

What will be the cost of gardening 1 metre broad boundary around a rectangular plot having a perimeter of 340 metres at the rate of Rs.10 per square metre?


  1. Rs.3400

  2. Rs.1700

  3. Cannot be determined

  4. None of these

  5. Rs.3440


Solution

The correct option is E

Rs.3440


2(l+b) = 340 (given)
Area of the boundary = [(l+2) (b+2) -- lb] =2 (l + b) + 4 = 344
Cost of gardening = Rs. (344 × 10) = Rs. 3440

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