WeBWorK using host: https://math-webwork3.unl.edu, format: simple seed: 123567890

An open box is to be made out of a 12-inch by 20-inch piece of
cardboard by cutting out squares of equal size from the four corners
and bending up the sides. Find the dimensions of the resulting box
that has the largest volume.

Dimensions of the bottom of the box: x
Height of the box: