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Discussion :: Mensuration

  1. There are two circles of different radii. The are of a square is 784 sq cm and its side is twice the radius of the larger circle. The radius of the larger circle is seven - third that of the smaller circle. Find the circumference of the smaller circle.
    2. A.
    6∏ cm
    B.
    8∏ cm
    C.
    12∏ cm
    D.
    16∏ cm
    E.
    None of these.

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    Answer : Option C

    Explanation :

    Let the radii of the larger and the smaller circles be l cm and s cm respectively. Let the side of the square be a cm. 

    a2 = 784 = (4)(196) = (22).(142) 

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