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11 February, 14:22

The length of a rectangle is five times its width.

If the area of the rectangle is 405 in^2, find its perimeter.

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Answers (1)
  1. 11 February, 18:21
    0
    The answer to your question is: Perimeter = 108 in

    Step-by-step explanation:

    Data

    Length (l) = 5 width (w)

    A = 405 in²

    Perimeter = ?

    Formula

    Area = l x w

    Perimeter = 2w + 2l

    Process

    405 = 5w x w

    405 = 5w²

    405/5 = w²

    w = √81

    w = 9 in

    l = 5 (9) = 45 in

    Perimeter = 2 (9) + 2 (45)

    = 18 + 90

    = 108 in
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