A cylindrical water tank has an interior radius of 2 meters and a height of 5 meters. The tank is filled with water, but 1 cubic meter of space is reserved for air.
To find out how much water the tank can hold, first calculate the total volume of the tank using the formula:
$$V = \pi r^2 h$$
where $r$ is the radius and $h$ is the height. Then, subtract the volume reserved for air from the total volume. What is the volume of the water in cubic meters that can be held in the tank?