Question

The edge of a cube is 20 cm. How many small cubes of 5cm edge can be formed from this cube

Answer 1

edge of cube = 20 cm
volume of cube = 20x20x20

volume of each small cube = 5x5x5

number of cubes
= (20x20x20)/(5x5x5)
=64

Answer 2

Answer:

64 cubes

Step-by-step explanation:

Edge of big cube = 20 cm

Volume of big cube = $Side^3$

                                 = $20^3$

                                 = $8000cm^3$

Edge of small cube = 5 cm

Volume of small cube = $Side^3$

                                 = $5^3$

                                 = $125 cm^3$

Number of small cubes can be formed from big cube = $\frac{8000}{125}$  

                                                                                          = $64$

Hence 64 cubes can be formed of edge 5 cm from the cube of edge 20 cm.