Question

Q20
Rani was cutting a solid cube of 4 inches
that has been painted red, green and
black on the opposite faces. She cut it
into smaller cubes of one inch for a
project. How many of the smaller cubes
have at most one face painted?
32
8
12
20​

Answer 1

The cubes which are painted on one face only are the cubes at the center of each face of the big cube.

Since there are 6 faces in the big cube and each of the face of big cube there will be four small cubes.

Hence, in all there will be 6 × 4 = 24 such small cubes (or) (x - 2)2 × 6.

No. of small cubes having only red paint = 4 + 4 = 8.

Hence, option (B) is the correct response

Answer 2

Answer:

No. of small cubes having only red paint =4+4=8

(B)-8