② volume; 4*6*8= 192 surface area: 2*(4*6+4*8)+6*8= 160 or 2(4*8+8*6)+4*6= 164 or 2 (6 *).

3. There are two possibilities:

Possibility 1: Because 32 = (1+2+5) × 4.

So the length, width and height of this cuboid are 5 meters, 2 meters and 1 meter respectively.

The volume is 5×2× 1= 10 cubic meter.

Possibility 2: Because 32 = (1+3+4) × 4.

So the length, width and height of this cuboid are 4 meters, 3 meters and 1 meter respectively.

The volume is 4×3× 1= 12 cubic meters.