Pressure at liquid interface Liquid 1 Liquid 2 p2 Liquid 3 p 1=Pgh 22=pgh+ p2gh2 P3-P1gh1 p2gh2 pghPressure at liquid interface P1 = 1gh1 P2 = 1gh1 + 2gh2 P3 = 1gh1 + 2gh2 + 3gh3  Liquid 1 1 Liquid 2 2 Liquid 3 3 h1 h2 h3 P1 P2 P3