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Thread: ratio of areas

  1. #1

    ratio of areas

    The ratio of the areas of two circles is 9:4. If the circumference of the smaller circle is , what is the perimeter of the larger circle?

    (A)
    (B)
    (C)
    (D)


    Thanks

  2. #2

    Talking ratio of circles' areas

    The ratio of the areas of two circles is 9:4

    The circumference of the smaller circle is given by the formula

    The circumference of the larger circle is given by the formula

    Therefore the correct answer is (D).

  3. #3
    Thank you!!

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