Question

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

• A. 4
• B. 32
• C. 64
• D. 100

Answer 1

The correct option is C 64

Let ‘n’ be the number of cubes which can be formed from the given cube. Volume of big cube = Volume of n smaller cubes

$20\times 20\times 20=n\times 5\times 5\times 5$

$n=\frac{20\times 20\times 20}{5\times 5\times 5}$

$=4\times 4\times 4=64$