Im trying to build garden boxes this summer and Im trying to determine the dimensions through optimization. Its been a long time since ive done this and I cant seem to model this mathematically. Id like a box where the volume=13.5ft^3 and the height of the frame to be 8 inches or .66ft. Id like to minimize the amount of material used. I guess im more bothered that this is a fairly simple problem and I cant remember how to model it. Im more concerned with the method than the answer. Thanks.