The edge of cube is 20 cm. How many smallcubes of 5 cm edge can be formed from this cube ?

Explanation

Given:
Edge of the bigger cube`=20 cm`.
Edge of the small cube`=5cm`.
Volume of a cube`=(sf"edge")^3`
Number of cubes formed by the larger cube`=`(Volume of larger cube)`/`(Volume of smaller cube)
Number of cubes formed`=(20)^3/(5)^3`
Number of cubes formed`=(20times20times20)/(5times5times5)`
Number of cubes formes`=4times4times4`
Number of cubes formed`=64`
Hence, the number of cubes formed having edge`=5 cm` from cubes having edge`=20 cm` is `64`.