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22 September, 07:26

The length of a rectangle is 2 m longer than its width. if the perimeter of the rectangle is 40 m, find its area.

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  1. 22 September, 09:52
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    L=w+2 and 2w+2l=40

    Substitute length for w+2 in perimeter formula.

    2w+2 (w+2) = 40

    2w+2w+4=40

    4w+4=40

    4w=36

    w=9

    l=w+2

    l=9+2

    l=11

    a=lw=11*9=99 meters
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