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14 February, 06:41

The perimeter of a rectangle is 84m. The length is two and a half times the width. Find the dimensions of the rectangle. Question 5 options: Length = 30m; Width = 12m Length = 28m; Width = 70m Length = 12m; Width = 30m Length = 70m; Width = 28m

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  1. 14 February, 06:48
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    w - width

    2.5w - length

    84m - perimeter

    w + w + 2.5w + 2.5w = 7w - perimeter

    The equation:

    7w = 84 divide both sides by 7

    w = 12 m

    length = 2.5w → 2.5w = 2.5 (12) = 30 m

    Answer: length = 30m; width = 12m
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