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14 November, 18:00

The perimeter of a rectangle is 128 cm. The length of the rectangle is three times longer than the width. What is the length and width of the rectangle?

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  1. 14 November, 21:01
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    l=16 cm

    w=48 cm

    Step-by-step explanation:

    perimeter of rectangle formula:

    2l+2w

    where

    3w=l

    and w=w

    so

    2 (3w) + 2w=128

    6w+2w=128

    8w=128

    w=16

    now substitute 16:

    2l+2 (16) = 128

    2l+32=128

    2l=96

    l=48
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