math

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Alan built an additional room onto his house. the length of the room is 3 times the width. the perimeter of he room is 60 feet. What is the length of the room?

a 7.5 feet
b 22.5 feet

  • math -

    sorry the all options are:
    a 7.5 feet
    b 22.5 feet
    c 15 feet
    d 45 feet....
    plz explain how to do also. plz . thanks

  • math -

    Perimeter is 2L + 2W

    L=3W
    Perimeter=6W+2W

    I assume you can take if from here.

  • math -

    sorry but i don't get it. can u help? :(

  • math -

    solve for Width in that last equation, then multiply it by 3 to get the length.

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