Question 1 of 50

The solid below is made up of 1cm cubes. How many more of such cubes are needed to from a solid with a volume of 20cm$^3$?

Question Image of The solid below is made up of 1cm cubes. How many more of such cubes are needed to from a solid with a volume of 20cm$^3$?   .
A
9
B
12
C
15
D
17
E
None of the above