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Math Help - Related Rates

  1. #1
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    Related Rates

    the problem says:

    In a right triangle, if one leg (adjacent to 90o) is 3cm, which is increasing
    at the speed of 2cm/second; and another leg is 4cm, which is decreasing at
    the speed of 2cm/second. How fast is the hypotenuse changing at this time?

    this is what i came up with https://www.dropbox.com/s/eyaw81bvue...2001.54.53.jpg

    i know for a fact i messed up somewhere towards the end...can someone please guide me in the right direction? thanks!
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  2. #2
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    Re: Related Rates

    To be honest, I think what you did is totally correct. Does your answer not match the answer key? Do you know what the right answer is?
    Thanks from noork85
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  3. #3
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    Re: Related Rates

    i dont. but i think you may be right that its correct. i repeated the problem a few time and came up with the same answer. i also looked at similar problems and my method seems correct....
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