3D shapes (Area & Perimeter)

Our class created these 3D shapes that contains 20 cubes.
Mr Ford asked us to find out how much paper we would need to wrap up the cubes.

Volume = 20 cm cubed
2 wide x 5 long x 2 high= 20

Area   
2x5=10 for each side.
2x2=4 for each end.
So the total area = 48 cm squares