A manometer reads the pressure of a gas in a enclosure as shown in figure(a) When some of the gas is removed by a pump, the manometer reads as in (b). The liquid used in the manometers is mercury and the atmospheric pressure is `76 cm` of mercury.

(i) Give the absolute and gauge pressure of the gas in the enclosure for cases (a) and (b) in units of cm of mercury .
(ii) How would the level change in case (b) if `13.6 cm` of water are poured into the right limb of the manometer?

Explanation

Absolute pressure =96cm of Hg. Gauge pressure =20 cm of Hg for (a) absolute pressure =58 cm of Hg gauge pressure=-18 cm for Hg