sides is xy. There for the totl surface area is:
A=2x^2+4xy square inches (assume x and y are in inches).
We are also told that the volume of the box is 5000 cubic inches, but we also
know that the volume of the box is length times breadth times height=x^2y.
so: x^2y=5000, or y=5000/x^2. So now substitute this back into the
equation for the surface area:
A=2x^2+4x(5000/x^2)=2x^2+20000/x square inches.