Question 152917
let x=width, so 2x=length


the surface area is 2[{length)(width)+(length)(depth)+(width)(depth)]


28=2[2x^2+8x+4x] __ dividing by 4 __ 7=x^2+6x __ subtracting 7 __ 0=x^2+6x-7


factoring __ 0=(x+7)(x-1)


x+7=0 __ x=-7 __ negative value not realistic


x-1=0 __ x=1 __ width=1 __ length=2