Question

Cube of side 12 cm is painted red on all the faces and then cut into smaller cubes, each of side 3 cm. What is the total number of smaller cubes having none of their faces painted?

Answer 1

Answer:

smaller cubes = 12x12x12/3x3x3

= 64 nos.

n = 3 v64=4

No. of cubes having none of their

faces Painted =(n-2)^3

= (4-2)^3=2^3=8. Ans