How many small cubes are there whose two adjacent faces are coloured red ?
A
0
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B
8
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C
16
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D
24
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Solution
The correct option is C 24 There are 64 small cubes. Hence one side of the big cube =3√64=4cm. Number of small cubes having two adjacent faces coloured red = (x - 2) x No. of edges = (4 - 2) x 12 = 24