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math

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The distance between goalpost, BC, is three times the distance from the top of the goalpost to the bottom. If the perimeter of ABCD is 21 1/3 yards, what is the length of BC

  • math -

    height of goalpost = x
    width of goalpost = 3x

    2(x+3x) = 21 1/3
    8x = 64/3
    x = 8/3

  • math -

    65

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