Question

A cube of side 4 cm is painted black on the pair of one opposite surfaces, blue on the pair of another
opposite surfaces and red on the remaining pair of opposite surfaces. The cube is now divided into
smaller cubes of equal side of 1cm each. Number of smaller cubes having less than 2 sides painted
are :
A)16 B)24 C)32 D)40

Answer 1

Answer:

Step-by-step explanation:

The cubes with 2 faces painted will be the cubes on the sides except the corner ones.

Therefore, face on the top and bottom will have 8+8=16 cubes and the front and the back face will have 4+4=8 cubes.

The cubes on the other two faces have been covered by the above four.

Therefore, total number of cubes =8+16=24.