Volume and surface area

This task is about surface area and volume of cuboids.

Diagram 1

a) What is the area of the net in Diagram 1? _________ cm2
 
The net is made up into a cube, which is shown in Diagram 2.

Diagram 2

b) i)
What is the volume of the cube? __________ cm3
 
  ii) What is the surface area of the cube? ________ cm2
 
Diagram 3 shows two of the cubes glued together.

Diagram 3

c) i)
What is the combined volume of the two cubes? _________ cm3
 
  ii) What is the surface area of the two cubes now that they are glued together? ________ cm3