Question

how many 5 cubes can cutoff from a cube whose edge is 20cm

Answer 1

Given two cubes ..

i.) A big solid cube with

edge ( a ) = 20cm

So, the volume of the big cube = a3

= ( 20 )3cm

= 8000 cm3

ii. ) A small cube with

edge ( a ) = 5cm

so, the volume of the small cube = a3

= ( 5 )3cm

= 125cm3

No. of small cubes that can be formed from the big cube = volume of small cube / volume of big cube

= 8000cm3 / 125cm3

= 64..

Therefore, 64 small cubes can e formed from the big cube...!!