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28 April, 17:14

A rectuangular room is 2 meters longer then its width its perimeter is 21.2

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  1. 28 April, 18:37
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    perimeter = 2L + 2W

    L=w+2

    21.2=2 (w+2) + 2w

    21.2 = 2w+4+2w

    21.2 = 4w+4

    17.2 = 4w

    w=4.3

    l=4.3+2 = 6.3

    check:

    6.3 + 6.3+4.3+4.3 = 21.2
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