16× 10= 160 (cubic centimeter)

2. There are two possibilities, one is 10× 10 and the other is 6×6.

The surface area of the bottom is10×10:10×10× 2+6×10× 4 = 440 (square centimeter).

The surface area of the bottom is 6× 6: 6× 6× 2+6×10× 4 = 312 (square centimeter).