3) A closed tank A is filled with carbon tetrachloride (SG=2.25) and has a small air space at its top. A manometer is connected between the two tanks. If the pressure at point B in the water tank is 118 kPa, find the air pressure in the closed space at the top of tank A. P=?? AIR SPACE CARBON TETRA- CHLORIDEL Ai. St 60 cm 90 cm 45 cm WATER B' MERCURY 3.4.13.6 90 cm -118 kPa 10