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Math Help - Rope around the world

  1. #1
    Site Founder MathGuru's Avatar
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    Rope around the world

    Let's say you have a loop of rope around the equater. How much longer would the rope need to be in order to have the rope lifted of off the ground by 1 inch all the way around the world?

    Another way to pose this question would be . . . If the radius of the earth increased by 1 inch how much longer would the rope need to be?
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  2. #2
    Newbie Cooler's Avatar
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    The answer is below, select text to see it.

    It would have to be about 6.3" longer:

    Length of rope = 2 * Pi * radius

    2*Pi*(r+1")-2*Pi*r=2*Pi*1" = ~6.3"
    Last edited by MathGuru; April 9th 2005 at 08:37 AM.
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  3. #3
    Junior Member theprof's Avatar
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    Quote Originally Posted by MathGuru
    Let's say you have a loop of rope around the equater. How much longer would the rope need to be in order to have the rope lifted of off the ground by 1 inch all the way around the world?

    Another way to pose this question would be . . . If the radius of the earth increased by 1 inch how much longer would the rope need to be?
    Try again with something newer

    bye
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