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Math Help - help with this word problem on differentiation - 3 variables - HARD

  1. #1
    Junior Member LexiRae's Avatar
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    help with this word problem on differentiation - 3 variables - HARD

    the figure is a right triangle with sides a (base) b (height) and c (hypotenuse.) it says:
    c is increasing at a rate of 2 in/min and (db/dt) = 3(da/dt)
    at what rate is the length a increasing when a = 3in and b = 4in?

    THANKS GUYS!
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  2. #2
    MHF Contributor
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    Start from a+b=c and derive with respect to time !
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