The water in a tank is pressurized by air, and the pressure is measured by a multi-fluid manometer as shown in fig. the tank is located on a mountain at an altitude of 1400 m where the atmospheric pressure is 85.6 kpa. determine the air pressure in the tank if h1 = 0.1 m, h2 = 0.2 m, and h3 =0.35 m. take the densities of water, oil, and mercury to be 1000 kg/m3, 850 kg/m3, and 13,600 kg/m3, respectively.