1.80 Two cylinders are filled with liquid water, p 1000kg/m, and connected by a line with a closed valve,as shown in Fig. PL.80. A has 100 kg and B has500

kg of water, their cross-sectional areas are A=0.1 m² and A=0.25 m², and the height h is 1m. Find the pressure on either side of the valve. The valve is opened, and water flows to an equilibrium.Find the final pressure at the valve location.