Posted by greg on Saturday, February 5, 2011 at 11:17am.
the equation you use is:
200=w(10+w)
200=10w+w^2
w^2+10w-200 = 0
(w+20)(w-10)= 0
w = -20 or 10
it has to be positive so the answer is 10.
The width is 10 yards and the length is 20 yards
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