Q. A cube of each side 4cm is painted red,yellow,blue on pair of opposite faces and cut into smaller cubes of side 1cm each.
FIND:
1)Number of cubes with 3 faces painted
2)two faces red and blue and others unpainted
3)only one face painted
4)atmost 2 faces painted

• 1) 8(corners of cube)
  2) 4(2 edges of a single plane each contain 2)
  3) 24(total 6 faces, each contain 4 small cube)
  4) 24(total edges 12, each contains 2 cubes)
  just consider rubee cube(3*3*3). this cube same but this cube has structure of (4*4*4) instead of 3.
• 11 years agoHelpfull: Yes(0) No(1)
• 1)8
  2)4
  3)24
  4)36(cubes painted on single face{4*3}+cubes painted on two faces{24})
• 10 years agoHelpfull: Yes(0) No(1)