$A$ cylindrical pencil sharpened at one edge is the combination of

$A$ metallic sphere with radius $6 \, cm$ is melted and recast into a wire of radius $0.4 \, cm$. Find the length of the wire in metres.

During the conversion of a solid from one shape to another,the volume of the new shape will

Curved surface area of a cylinder $= \ldots \ldots \ldots \ldots$

For a given frustum of a cone,the circumference of the base is $48 \, cm$ and the circumference of the top is $36 \, cm$. If its height is $11 \, cm$,find its volume (in $cm^3$).

$A$ metallic sphere of radius $21 \,cm$ is melted and recast into a wire with radius $0.5 \,cm$. Find the length of the wire in metres.