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    Question

    If the ratio of areas of two circle is 49:81, then the

    ratio of their circumferences will be:
    A 7:9 Correct Answer Incorrect Answer
    B 3:4 Correct Answer Incorrect Answer
    C 2:5 Correct Answer Incorrect Answer
    D 6:7 Correct Answer Incorrect Answer

    Solution

    Ratio of area of two circles = (Ratio of radius)2 = 49:81 Ratio of Circumference = Ratio of radius Hence, Ratio of Circumference = √(49/81) = 7:9

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