Question

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?
​

Answer 1

Answer:

8 pieces will have exactly two painted faces

Answer 2

let the length of the sides of cube be a

surface area in which it is painted=6a^2

=6×3×3=54cm^2

now according to question

let the total cubes be n

54=n(2×1^2)

n=27

hence 27 cubes will be formed