There is a red cube and it is cut into 12 * 12 * 12 small cubes. now corner columns of front face is taken out and remaining structure is painted black. now 5 ques were there to calculate no of cubes having 1,2,3 red faces and 1, 2, 3 black faces?

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Neha

  • Jul 11th, 2007
 

Considering that only the outer surfaces are red/black,

1 red face -> 0

2 red faces -> 20

3 red faces -> 4


1 black face -> 560

2 black faces -> 132

3 black faces -> 12

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