To calculate the volume \( V \) of a cylinder, you can use the formula:
\[ V = \pi r^2 h \]
where \( r \) is the radius and \( h \) is the height of the cylinder.
Given:
- Height (\( h \)) = 20 cm
- Radius (\( r \)) = 5 cm
Now, substitute the values into the formula:
\[ V = \pi (5)^2 (20) \] \[ V = \pi (25) (20) \] \[ V = 500\pi \text{ cm}^3 \]
So, the volume of the cylinder is \( \boxed{500\pi} \text{ cm}^3 \).