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13 September, 16:50

The length of a rectangle is three times it's width, the perimeter of the rectangle is 56cm, find the length and width

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  1. 13 September, 18:24
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    Answer: Length: 21 cm Width: 7 cm

    Step-by-step explanation:So, two of the sides are 3 units long, and two of the sides are 1 unit long. The total number of units in the perimeter of the rectangle is 8.

    56cm / 8units = 7cm/unit

    So, the length of the rectangle is 7cm/unit x 3 units, or 21 cm.

    The width of the rectangle 1/3 of the length, or 7cm.

    Length: 21 cm

    Width: 7 cm
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