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29 November, 05:44

A rectangle has an area 40 square units. The length is 6 units greater than the width. What are the dimensions?

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Answers (2)
  1. 29 November, 05:51
    0
    Length 10, width 4

    Work

    40 = lw = (6+w) * w

    40 = w^2 + 6w

    40 + 9 = 49 = w^2 + 6w + 9

    49 = (w + 3) ^2

    7 = w + 3

    w = 7-3 = 4

    remember that 40 = lw? We now know w, so let's find l:

    40 = 4l

    l = 40/4 = 10

    Length 10 units, width 4 units
  2. 29 November, 09:01
    0
    10,4

    Step-by-step explanation:

    width = w

    length = l = w+4

    area = l*w = (w+4) * w
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