A hollow rectangular parallelepiped has external dimensions 12 cm x 10 cm x 8 cm and a thickness of 1 cm. Find its volume.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 480 cm3
External volume = 12 × 10 × 8 = 960 cm³
Internal dimensions:
Length = 12 − 2 = 10 cm
Breadth = 10 − 2 = 8 cm
Height = 8 − 2 = 6 cm
Internal volume = 10 × 8 × 6 = 480 cm3
Volume of hollow parallelepiped = 960 − 480 = 480 cm3
Therefore, the volume is 480 cm3.