How does the pressure at a certain depth in sea water differ from that at the same depth in river water? Explain your answer.

Pressure = P

Where,

h = Depth of the point where pressure is to be measured

ρ = Density of the liquid

g = acceleration due to gravity

So though the depth is same but the, pressure depends on three factors i.e. depth of the point where pressure is to be measured, density of the liquid and acceleration due to gravity. The sea water and the river water have different densities so the pressure is different even at the same depth