The curved surface area of a cone with radius $12 \, cm$ and slant height $20 \, cm$ is ....... $\pi \, cm^2$.

The $CSA$ (Curved Surface Area) of a cylinder is equal to $\ldots \ldots \ldots$

Total surface area of a cuboid measuring $15\,cm \times 12\,cm \times 10\,cm$ is $\ldots \ldots \ldots \,cm^{2}$.

$A$ cylinder with radius $21 \, cm$ and height $18 \, cm$ is closed at both the ends by hemispheres. Find the surface area of this article. $(\pi = \frac{22}{7})$ (in $cm^2$)

Curved surface area of a hemisphere $= \ldots \ldots \ldots . .$

Total surface area of a cone exceeds its curved surface area by $\ldots \ldots \ldots . . .$