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Math Help - Perimeter Word Problem

  1. #1
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    Perimeter Word Problem

    A standard rectangular billboard sign has a perimeter of 124 ft. The length is 6 ft. more than three times the width. Find the dimensions of the sign.

    All I know is that I've got a 3w+6 and 124. But the equation 3w+6=124 does not work.

    The answer is length, 48; width, 14. But I'm not coming very close to those. Any help is greatly appreciated. Thanks!
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  2. #2
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    Quote Originally Posted by Ingersoll View Post
    A standard rectangular billboard sign has a perimeter of 124 ft. The length is 6 ft. more than three times the width. Find the dimensions of the sign.

    All I know is that I've got a 3w+6 and 124. But the equation 3w+6=124 does not work.

    The answer is length, 48; width, 14. But I'm not coming very close to those. Any help is greatly appreciated. Thanks!
    you just set one length equal to the perimeter ...

    P = 2L + 2W
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  3. #3
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    Thanks, but... I really do like to work through these myself but I need a little more help with this one.
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  4. #4
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    P = 2L + 2W = 2(3W+6) + 2W = 124

    solve for W
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  5. #5
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    Thanks. I just got back on the computer to tell you nevermind; that I'd figured it out. But again, thank you for taking the time to help me. It is much appreciated.
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