This block measures 5 cm × 3 cm × 4 cm (length × depth × height). It is painted green all over and cut into 1 cm cubes. How many of the small cubes have exactly two green faces?

Question

Accepted Answer

24. Two-face cubes lie on the 12 edges, minus the corners: 4 edges of each length give 4[(5-2)+(3-2)+(4-2)]=4×6=24.

This block measures 5 cm × 3 cm × 4 cm (length × depth × height). It is painted green all over and cut into 1 cm cubes. How many of the small cubes have exactly two green faces?

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