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    Question

    If the ratio of areas of two circle is 9:25, then the

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

    Solution

    Ratio of area of two circles = (Ratio of radius)2 = 9:25 Ratio of Circumference = Ratio of radius Hence, Ratio of Circumference = √(9/25) = 3:5

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