Question

A 6′′ × 6′′ square sheet of metal is made
into an open box by cutting out a square at
each corner and then folding up the four sides.
Determine the maximum volume, Vmax, of the
box.
1. Vmax = 26 cu. ins.
2. Vmax = 31 cu. ins.
3. Vmax = 36 cu. ins.
4. Vmax = 21 cu. ins.
5. Vmax = 16 cu. ins.