A closed manometer is filled with 3 fluids first on the left leg with density 8 kg/m^3 and length 10 cm, middle one with density 10 kg/m^3 and height difference 5 cm more on right leg and the third on the right leg with density 15 kg/m^3, what is the length of the third liquid?
(a) 1 cm
(b) 2 cm
(c) 3 cm
(d) 4 cm
This question was posed to me in a job interview.
This key question is from Differential Pressure Measurements in section Temperature and Pressure of Basic Chemical Engineering