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10 November, 02:13

My basement has an area of 5,120 square feet. The width of the basement is 4/5 its length. What is the length of basement

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  1. 10 November, 02:26
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    A = L * W

    W = 4/5L

    5120 = L (4/5L)

    5120 = 4/5L^2

    5120 * 5/4 = L^2

    6400 = L^2 ... take the square root of both sides, eliminating the ^2

    sqrt 6400 = L

    80 = L ... length is 80 ft <===

    W = 4/5L

    W = 4/5 (80)

    W = 64 ... width is 64 ft
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