Answer:
A Cylinder is
a threedimensional shape whose crosssections are all circles of
the same radius. It could be solid like a stick of rock or hollow
like a can. By opening out the label on the can of soup it can be
seen that the area of the curved part of a cylinder is given by
Circumference x height = π d x h = π d h.
The Volume of
a cylinder is area of the circular base x height
= π r^{2} x h = π r^{2} h
