Question 10 (5 marks)
The water in a tank is pressurized by air, and the pressure is measured by a multifluid manometer. The tank is located on a mountain at an altitude of 1400 m where the atmospheric pressure is 8N.6 kPa. Determine the absolute air pressure in the tank if $h_1$=0.1 m, $h_2$=0.2 m, and $h_3$=0.35 m. Take the densities of water, oil, and mercury to be 1000 kg/m$^3$, 8N0 kg/m$^3$, and 13,650 kg/m$^3$, respectively. The N value is based on the last digit of your student ID. For example, for a student with ID 41234564, the values are 84.6 kPa and 840 kg/m$^3$.