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Math Help - walking speed

  1. #1
    Super Member bigwave's Avatar
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    walking speed

    This should be a very easy problem. but the way it is worded might confuse

    The maximum walking speed S (in feet per second) of an walking animal is given by the function S = \sqrt{GT} where G is 32 feet per second squared and L is the length of the animal's leg (in feet)

    How fast can an animal whose legs are 9 inches long walk?
    Round off your answer to the nearest hundredth.

    The answer to this is 12\sqrt{2} or 16.97 but don't see how this was derived
    Last edited by bigwave; September 2nd 2010 at 02:23 PM.
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  2. #2
    MHF Contributor undefined's Avatar
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    Quote Originally Posted by bigwave View Post
    This should be a very easy problem. but the way it is worded might confuse

    The maximum walking speed S (in feet per second) of an walking animal is given by the function S = \sqrt{GT} where G is 32 feet per second squared and L is the length of the animal's leg (in feet)

    How fast can an animal whose legs are 9 inches long walk?
    Round off your answer to the nearest hundredth.

    The answer to this is 12\sqrt{2} or 16.97 but don't see how this was derived
    16.97 is if the animal's legs are 9 feet long.

    I get 4.90 as the correct answer.
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  3. #3
    Super Member bigwave's Avatar
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    looks like a typo in the text book???
    well not the first time

    I dbl ckd it does say inches not feet
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