I was doing chapter named kinetic theory of gases from a book. here's the question. A mercury monometer consists of two unequal arms of equal cross section area 1 cm^2 and lengths 100 cm and 50 cms. The two open ends are sealed with air in the tube at a pressure of 80 cm of mercury. some amount of mercury is now induced in the monometer through the stopclock connected to it. If mercury rises in the short tube to a length 10 cm in steady state, find the length of mercury column rised in the longer tube.