The number of 5 cm cubes which can be cut from a cube whose edge is 20 cm is

Correct option is D

Given:

Edge of the big cube = 20 cm

Edge of the small cube = 5 cm

Formula Used:

Number of cubes = $$\left(\frac{\text{Edge of big cube}}{\text{Edge of small cube}}\right)^3$$​​

Solution:

Number of small cubes along one edge:

$$\frac{20}{5}$$​ = 4

Total number of small cubes = 4³ = 64

Number of 5 cm cubes = 64