If each edge of a cube is doubled:
(i) How many times will its surface area increase?
(ii) How many times will its volume increase? [4 MARKS]
Concept : 1 Mark
Solution: 3 Marks
Let the size of cube = a
Volume of cube (V)
Surface area of cube(S)
Since the side doubled, let the new side be 2a.
(i) New surface area
The surface area will increase by 4 times.
(ii) New volume of cube
The volume will increase by 8 times.