A 4 cm cube is cut into 1 cm cubes. The total surface area of all the small cubes is :

Solution (By Examveda Team)

Number of small cube formed :
$$\eqalign{ & = \left( {\frac{{4 \times 4 \times 4}}{{1 \times 1 \times 1}}} \right) \cr & = 64 \cr} $$
Total surface area of the small cubes :
$$\eqalign{ & = \left[ {64 \times \left( {6 \times {1^2}} \right)} \right]{\text{c}}{{\text{m}}^2} \cr & = 384{\text{ c}}{{\text{m}}^2} \cr} $$