A solid cuboid is melted to form a number of cubes. If the length, breadth and height of a cuboid are 20 cm, 16 cm and 8 cm, and the edge of each cube is 4 cm, then the number of cubes is:
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 40.
Volume of the cuboid = 20 × 16 × 8 = 2560 cm3
Volume of one cube = 43 = 64 cm3
Number of cubes = 2560/64 = 40
Therefore, the number of cubes is 40.