Another problem I'm having a tough time with.

Find the dimensions of a box with a square bottom and no top that will hold exactly http://webwork.uoregon.edu/webwork2_...123f2a9831.png cubic inches and have the smallest possible surface area.

The answers are apparently 1.25992A by 1.25992A by 1.25992A/2, but I have no idea how to get there. Any help would be greatly appreciated. Thanks!