28. an open top box is to be formed by cutting out squares from
the corners of a 50 centimeter x 30 centimeter rectangular sheet of
material. The height of the box must be a whole number of
centimeters. What size squares should be cut out to obtain the box
with maximum volume.
a. Understanding the problem: If 6 centimeter x
6 centimeter squares are cut from from the corners, the height of
the box will be 6 centimeters. In...