we know that
the cube is a prism rectangular with minimum surface area
then
Volume cube=b³=80-------------> b=4.31 ft
the problem is asking me for a whole number
therefore
b=4 ft------------> I assume a rectangular prism of square base
V=b²*h--------------> h=V/b²=80/4²=5 ft
the answer is 4 ft x 4 ft x 5 ft number dimensions of the container
