Posted by Anonymous on Saturday, February 19, 2011 at 9:26pm.
length --- x
width ---- x/3 + 3
x(x/3 + 3) = 120
x^2/3 + 3x - 120 = 0
x^2 + 9x - 360 = 0
(x-15)(x+24) = 0
x = 15 or x = -24, but x > 0
the length is 15
width = 15/3 + 3 or 8
check (8)(15) = 120
3 more than 1/3 of 15 gives us 8
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