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November 24, 2014

November 24, 2014

Posted by **kate** on Wednesday, October 19, 2011 at 6:10pm.

- math -
**Steve**, Thursday, October 20, 2011 at 12:38amarea = width * length

length = 1+3*width

area = width * (1+3*width)

72 = w(1+3w) = w + 3w^{2}

3w^{2}+ w - 72 = 0

w = (-1 + sqrt(865))/6 = 4.7

so, rounding up, w = 5'

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