Answer:
P = 400248 [Pa]
Step-by-step explanation:
We can calculate the hydrostatic pressure exerted by a column of liquid by means of the following equation.
![P=Ro*g*h](https://img.qammunity.org/2021/formulas/physics/high-school/on3b7fizk81z0vypr665j3r4bsfsyuk0dw.png)
where:
Ro = density = 1020 [kg/m³]
g = gravity acceleration = 9.81 [m/s²]
h = depth = 40 [m]
Therefore:
![P=1020*9.81*40\\P=400248 [Pa]](https://img.qammunity.org/2021/formulas/physics/high-school/56hk6g400gam8kdf5pk0hxezwumucamgia.png)