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Math Help - Baloon Diameter Problem

  1. #1
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    Baloon Diameter Problem

    How much longer does it take to inflate a balloon to a diameter of 25 inches instead of a diameter of 5 inches. Assume the rate that air enters is constant.
    _____________________times as long


    I've tried, 5, 10, 15, and 25 but none of those right. I can't figure out how to go about this problem :/
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  2. #2
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    Quote Originally Posted by Togechu64 View Post
    How much longer does it take to inflate a balloon to a diameter of 25 inches instead of a diameter of 5 inches. Assume the rate that air enters is constant.
    _____________________times as long


    I've tried, 5, 10, 15, and 25 but none of those right. I can't figure out how to go about this problem :/
    V = \frac{4}{3}\pi r^3

    radius is 5 times larger ... volume is 5^3 times larger
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    Thank you very much
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