Here is the question:
I have posted a link there to this topic so the OP can see my work.Help with a max/min question regarding a rectangular volume. help please math smarties?
A closed rectangular box with a square base and rectangular sides is to be constructed using two different materials. The bottom and sides are made from stronger material that costs $3, and the top of the box is made from a cheaper materials costing $2 per square foot. If Sasha has $100 to spend on creating this box, what is the box of largest volume she can afford?