Question

A cube of side 4cm is painted red on all of its surfaces and then divided into various smaller cubes of side 1cm each. find the number of smaller cubes with two surfaces painted red

Answer 1

For a cube, there are 12 edges.
Each edge have 2 smaller cubes painted on two surfaces.
So, no. of smaller cubes with two surfaces painted red are 12 X 2 = 24

Answer 2

Answer: There are 24 smaller cubes with two surfaces painted red.

Step-by-step explanation:

Since we have given that

Length of a cube = 4 cm

Length of smaller cube = 1 cm

We need to find the number of smaller cubes with two surfaces painted red.

As we know that

n=4

So, number of two surfaces painted red is given by

$12(n-2)\\\\=12(4-2)\\\\=12\times 2\\\\=24$

Hence, there are 24 smaller cubes with two surfaces painted red.