Question 113347
LENGTH=3W-10
180=(3W-10)W
180=3W^2-10W
3W^2-10W-180=0
USING THE QUADRATIC EQUATION WE GET:
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}} 
W=(10+-SQRT[10^2-4*3*-180])/2*3
W=(10+-SQRT100+2160])/6
W=(10+-SQRT2260)/6
W=(10+-47.54)/6
W=(10+47.54)/6
W=57.54)/6
W=9.59 ANSWER.
W=(10-47.54)/6
W=-37.54/6
W=-6.26 ANSWER.