1. The problem statement, all variables and given/known data The hydraulic system is this: It has two stamps (Unsure of how I am to translate that word). Basically it is the plate on which we apply pressure. You apply pressure on one of them, the other goes up. The question is: How high will the big stamp move upwards when the small one is pressed down with a force F to 6 .0 cm? Area of the small one = 2.0 cm^2 Radius of the small one = 6 cm F = 250N 3. The attempt at a solution The proposed solutions is just answering with this: a (area of the small one) * h (6.0 cm) = AH ah = AH => H = (ah)/A I don't understand why? Thank you in advance.