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Math Help - Solve by seperation of Variables

  1. #1
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    Solve by seperation of Variables

    A body at an unknown temperature is placed in a room which is held at a constant temperature of F. If after 10 minutes the temperature of the body is F and after 20 minutes the temperature of teh body is , find the body's initial temperature.
    I have no idea to even begin to start the problem. I just don't understand how i would write the initial equation for it.
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  2. #2
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    e^(i*pi)'s Avatar
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    Do you know Newton's Law of Cooling?

    http://en.wikipedia.org/wiki/Convect...law_of_cooling

    You don't need the area to solve this problem though
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