Cube and it's Total Surface Area

Q. Eight identical cubes of side $4$ cm each are brought together to form a new cube. What will be the total surface area of the new resulting cube?

1. $768$ cm${}^2$
2. $384$ cm${}^2$
3. $572$ cm${}^2$

Q. If the total surface area of a cube is $726$ m${}^2$, what is the length of a side of the cube in meters?

Q. If $5$ cc of paint is required per unit area, estimate the amount of paint (in cc) that will be required to paint this cube on all sides.

1. $41070$
2. $8214$
3. $81070$
4. $4214$

Q. By how much will the total surface area of a cube with side $43$ cm be more than that of a cube with side $26$ cm ?