The area of a rectangle wall of a barn is 177 square feet It

The area of a rectangle wall of a barn is 177 square feet. Its length is 4ft longer than its width of the wall of the barn. Width=___ Length=___

Area = 177 sq-feet

length = 4 +width

l = 4+w

So, Area = l*w = (4+w)w = 177

w^2 +4w -177 =0

solve the quadratic equation :

w = ( -4 +/- sqrt(16 +177*4) )/2

w = 11.45 , -15.45

Neglect the -ve root :

width = 11.45 feet

length = 11.45+4 = 15.45 feet