If the areas of three adjacent faces of a cuboid are $x, y, z$ respectively, then the volume of the cuboid is 

How many bags of grain can be stored in a cuboidal granary $(8 \mathrm{m}\times 6 \mathrm{m}\times 3 \mathrm{m})$, if each bag occupies a space of $0.64 {\mathrm{m}}^3$?

A cube of side $6 \mathrm{cm}$ is cut into a number of cubes each of side $2 \mathrm{cm}$. The number of cubes formed is 

The diameter of base of a cylinder is $4 \mathrm{cm}$ and its height $14 \mathrm{cm}$. The volume of the cylinder is 

[Take $\mathrm{\pi }=\frac{22}{7}$]

The diameter of a cylinder is $28 \mathrm{cm}$ and its height is $20 \mathrm{cm}$. The total surface area of the cylinder is