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    Question

    The diameter of a circular field is equal

    to the side of a square field. If the total cost of fencing the circular field is Rs. 715 at the rate of Rs.13/m, what is the perimeter of the square fields?
    A 84 m Correct Answer Incorrect Answer
    B 70 m Correct Answer Incorrect Answer
    C 56 m Correct Answer Incorrect Answer
    D 28 m Correct Answer Incorrect Answer
    E 42 m Correct Answer Incorrect Answer

    Solution

    Let the diameter of circular field is 2r, and radius = r Acoording to question, 2 x (22/7) x r = 715/13 2 x (22/7) x r = 55 r = 8.75 m Diameter =2r = 17.5 m Perimeter of square field = 4 x 17.5 = 70 m

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