Answer:
3
Explanation:
Since you know that the shape is a cube, that means that all the sides are the same length.
The factors of 27 are 1 & 27, 3 & 9.
1 & 27 won't work for this problem so you use 3 & 9.
9 is divisible by 3 so what you would get is 3 x 3 x 3 which then equals 27.