math

Mary wants to build a fence in the yard to keep her dog from running away. She only has 60 feet of fencing. If she wants to create a rectangular space that has a length that is twice as long as the width. How long is each side of the rectangular space?

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asked by sasha
  1. Let x = width
    Let 2x = length

    Perimeter of rectangle:
    P = 2*(length + width)

    Substitute:
    60 = 2*(2x + x)
    60 = 2*3x
    60 = 6x
    x = 10 ft (width)
    2x = 20 ft (length)

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    posted by Jai

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