Hi! can someome help me with this exercise
An open top box with a rectagular base is to be constructed. The box is to be at least 2 inches wide and twice as long as it is wide and is to have a volume of 150 cubic inches. What should the dimensions of the box be if the surface area is to be
a. 90 square inches ? b. as small as possible?
I have already done some of these problems , but I don't know how to set up this one.