A pistоn оf crоss-sectionаl аreа a is used in a hydraulic press to exert a small force of magnitude f on the enclosed liquid. A connecting pipe leads to a larger piston of cross-sectional area A (the figure). If the piston diameters are 3.16 cm and 59.1 cm, what force magnitude on the small piston will balance a 31.1 kN force on the large piston?