A solid cube of 3 cm side, painted on all its faces, is cut up into small cubes of 1 cm side. How many of the small cubes will have exactly two painted faces?
A
12
B
8
C
6
D
4
Correct Answer: Option A
Explanation
1. **Determine Grid Size (n):** First, we calculate how many small cubes are along one side of the big cube. Since the big cube is 3 cm and small cubes are 1 cm, $n = 3/1 = 3$ [50].
2. **Iden