Water is used in a spray chamber as a spray fluid to treat standard air-containing particles with density 1000 kg/m3. The flow rate of air is 120 m3/min and that of water is 0.3 m3/min. The average drop size is 1000 lam. The spray chamber has a diameter of 1m and height 3m. What is the overall collection efficiency of the spray chamber if the average particle size is 2.5 ium ? [Data : Individual Drop Collection efficiency is 9%]