A rectangular storage container with an open top is to have a volume of 10 cubic meters. The length of the box is twice its width. Material for the base costs ten dollars per square meter and for the four sides the cost is six dollars per square meter. Find the cost of materials for the cheapest such container.
I am having issues finding the constraint and expression to optimize. How do I go about finding them? I know how to solve the problem once I find those equations but I am unable to. Thanks!