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15 August, 02:50

The area of a rectangular wall of a barn is 220 square feet. its length is 12 feet longer than the width. find the length and width of the wall of the barn.

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  1. 15 August, 04:26
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    Width - x

    Length - (x+12)

    Area - x (x+12)

    x (x+12) = 220

    x²+12x-220=0 - 220 = 22 * (-10), 12=22-10

    (x+22) (x-10) = 0

    x=-22, x=10

    For width we can use only positive number,

    so, width is 10 feet.

    Length is 10+12=22 feet.
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