The hydraulic lift is an example of the liquid pressure.
A hydraulic lift is used to lift the heavy loads.
If a small force f is applied on the piston of C then the pressure exerted on the liquid
a = Area of a cross-section of the piston in C
This pressure is transmitted equally to the piston of cylinder D.
Where F=Upward force acting on the piston of cylinder D.
A=Area of a cross-section of the piston in D
Condition of Hydraulic Lift-
So heavy load placed on the larger Piston is easily lifted upward.