In: Math
A rectangular box is to have a square base and a volume of 40 ft3. If the material for the base costs $0.35 per square foot, the material for the sides costs $0.05 per square foot, and the material for the top costs $0.15 per square foot, determine the dimensions of the box that can be constructed at minimum cost.
= Length
Width
Height
how do i find length width and height