How Far Must a Small Piston Be Pushed to Lift a Larger One by 20 cm?

[jacob.jonathon]

1. How far must a 2.0-cm-diameter piston be pushed down into one cylinder of a hydraulic lift to raise an 8.0-cm-diameter piston by 20 cm?

Homework Equations

3. what equations do i use is it pV=nRT

 

[Shooting Star]

Volume displaced by small piston must be equal to volume displaced in bigger cylinder. The liquid is taken to be incompressible.