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23 April, 16:07

The area of a rectangular wall of a barn is 260 square feet. it's length is 6 feel longer than twice it's width. find the length and width of the wall of the barn

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  1. 23 April, 16:21
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    L=2w+6

    260=lw

    Substitute for l

    260=w (2w+6)

    260 = 2w^2+6w

    2w^2+6w-260=0

    2 (w^2+3w-130)

    2 (w+13) (w-10)

    w=-13, w=10

    Since width cannot be negative it must be 10

    260=l (10)

    26=l

    Final answer: length-26 ft, width-10ft
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