18. The water in a tank is pressurized by air and the pressure is measured by a multifluid manometer as shown in figure. The tank is located on a mountain at an altitude of 1400n 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 100 kg/m³, 850 kg/m³, and 13600 kg/m³, respectively AIR WATER Mercury

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Pressure and Stress