What is the volume of a cylinder with a diameter of 10m and a height of 5m

The volume of the cylinder is

V = pi r^2 * h

where:

r : radius of cross section.

pi: const = 3.14

h: height of the cylinder

You can think of it in terms of a circle which you keep cloning to create the height so each time you gain the same circle area.

The formula can be proved using integration. (if you want request).

h = 5m
r = D/2 = 10/2 = 5 m

Pi = 3.14

V = 3.14 * (5)^2 * 5 = 392.5 m^3