Mathematics · Cubes and Dice
A cuboid of dimensions 24 cm × 18 cm × 12 cm has all its faces painted blue. It is cut into smaller cubes, each having a volume of 8 cm3. Find the relationship that correctly gives the number of small cubes having only one face painted.
- 1(number of small cubes having no face painted) + 4
- 2(number of small cubes having 2 faces painted) - 20
- 3(number of small cubes having no face painted) - 4✓
- 43 × (number of small cubes having 2 faces painted) + 24
Correct answer
(number of small cubes having no face painted) - 4
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