Physics - Fluid Question with Solution | TestHub

The pressure at the bottom of a liquid column is given by the formula $P=\rho gh$, where $\rho$ is the density of the liquid, $g$ is the acceleration due to gravity, and $h$ is the height of the liquid column.

From this relation, it is clear that the pressure is directly proportional to the density of the liquid, the height of the liquid in the tank, and the acceleration due to gravity.

The pressure does not depend on the area of the water surface or the shape of the container. Therefore, the pressure at the bottom of a water tank is not proportional to the area of the water surface.

Answer: area of the water surface.