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March 30, 2017

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The area of a rectangle is 72 square inches and the perimeter is 44 inches. Find its dimensions.

  • math - ,

    area=lw
    lw=72 or l=72/w

    P=2(l+w)=2(72/w + w)

    44=2(72/w+w)
    22w=7+w^2

    w^2-22w+72=0
    (w-18)(w-4)=0
    so w is 18, or 4, and you can solve for the length from l=72/w

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