Question 342278
volume = length * width * height
square base ... let length and width = x
x^2 * height = 7
height = 7 / x^2

Surface area (with open top) = bottom + 4 sides

Surface area = x^2 + 4 * x * height

. . . we already know height = 7 / x^2, so substute

Surface area = x^2 + 4x * 7 / x^2 
Surface area = x^2 + 28 / x <=======