Cylindrical Tank Drainage Time

A cylindrical water tank has a radius of 3 meters and a height of 5 meters. The tank is completely filled with water. If water is drained from the tank at a rate of 2 cubic meters per hour, how many hours will it take to drain the tank completely?

Recall that the volume of a cylinder is calculated using the formula: $$V = \pi r^2 h$$, where $$r$$ is the radius and $$h$$ is the height.