Question

How many cubes each of side $0.5$ cm are required to build a cube of volume $8c{m}^3?$

Answer 1

We know, volume of a cube $V=a^3$, where $a$ is the side of the cube.

Volume of one cube of side $0.5cm={0.5}^3=0.5\times 0.5\times 0.5$

$=0.125c{m}^3$.

No. of cubes required to built a cube of volume $8c{m}^3$

$=\frac{\text{Volume of the new cube}}{\text{Volume of one cube}}$

$=\frac{8}{0.125}$

$=8\times 8$

$=64$ cubes.

Hence, the required number of cubes is $64$ cubes.