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    Question

    A circular park has a diameter of 140 metres. A fence,

    12 metres high, is to be constructed all around the park along its boundary. If the cost of fencing is Rs. 2.50 per square metre, calculate the total cost of constructing the fence. (Use π = 22/7)
    A Rs. 13200 Correct Answer Incorrect Answer
    B Rs. 14400 Correct Answer Incorrect Answer
    C Rs. 11500 Correct Answer Incorrect Answer
    D Rs. 12400 Correct Answer Incorrect Answer

    Solution

    Radius of the park = (140/2) = 70 metres

    Perimeter of the fence = 2 X π X radius = 2 X (22/7) X 70 = 440 metres

    So, area to be fenced = 440 X 12 = 5,280 m 2

    So, required cost = 5,280 X 2.5 = Rs. 13,200

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