Pascal's law states that, "The pressure is equally exerted perpendicularly on all sides as pressure is applied at a place on a liquid contaied in a closed container".
Hydraulic press, Hydraulic break and hydraulic lift are three examples that uses pascal's law.
Automobiles use hydraulic breaking system. When driver applies small force into the brake pad it has applied in a small area but when that force reaches to the break pad of the truck (which has large area) the force is magnified to the original times the area of the break pad, according to pascal's law. So a heavy loaded truck be stopped by appling a small force by a driver.
Upthrust is the upward force exerted by liquid acting on an immersed body. It is the resultant thrust acting upward by the liquid.
Density of a substance is defined as the mass per unit volume.
The relative density of a body is defined as the ratio of the mass of a particular volume of that body to the mass of same volume of water at 4 degree centigrade. It is aldo called relative density.
The force that acts perpendicular to and into a surface is called thrust.

Pascal's law states that liquid exerts pressure equally in all directions.

Given,

Depth of water (h) = 6m

Density of water (d) = 1000 kg/m3

Acceleration due to gravity(g) =9.8 m/sec2

Pressure of water (P) =?

We know,

P= h x d x g

= 6 x 1000 x 9.8

= 58800 Pa

Hence, the water pressure exerted at the bottem of the tank is 58800 Pascal.