The $CSA$ of a cone with radius $4 \, cm$ and slant height $6 \, cm$ is $\ldots \ldots \ldots \ldots cm^{2}$. (in $\pi$)

The Curved Surface Area $(CSA)$ of a frustum of a cone is given by:

Total surface area of a closed cube with length $4 \, cm$ is $\ldots \ldots \ldots cm^{2}$.

Volume of a cone $= \dots$

$A$ solid toy is in the form of a hemisphere surmounted by a right circular cone. The height of the cone is $4\, cm$ and the diameter of the base is $8\, cm$. Determine the volume of the toy. If a cube circumscribes the toy,then find the difference of the volumes of cube and the toy. Also,find the total surface area of the toy.

Total surface area of a cylinder with radius $7 \, cm$ and height $13 \, cm$ is $\ldots \ldots \ldots \ldots \, cm^{2}$.