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16 February, 21:14

A rectangle has a perimeter of 84cm and a length of 30. what is its width?

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  1. 16 February, 21:59
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    P = 2 (L + W)

    P = 84

    L = 30

    84 = 2 (30 + W)

    84 = 60 + 2W

    84 - 60 = 2W

    24 = 2W

    24/2 = W

    12 = W ... width is 12 cm
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