A cube is painted blue on two adjacent faces. It is painted brown on the faces opposite to blue faces and yellow on the remaining faces. After being cut into sixty-four smaller cubes of equal size, what is the fraction of the cubes which have exactly one face painted blue?
Answers
Given : A cube is painted blue on two adjacent faces. It is painted brown on the faces opposite to blue faces and yellow on the remaining faces. then cut into sixty-four smaller cubes of equal size,
To Find : what is the fraction of the cubes which have exactly one face painted blue?
Solution:
Cube is cut in 64 Cubes
4 x 4 x 4 = 64
cube is painted blue on two adjacent faces
Hence at one edge two faces will have blue color
2 x (16 - 4) = 24
24 cubes have exactly one face painted blue
Fraction = (24/64) = 3/8
If Only one face colored blue and no other color then
2 * (4 - 2)(4 - 2) = 8
8 Cubes have only one face painted blue
Fraction = 8/64 = 1/8
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