A content of gas stream is reduced from 4% to 0.4% in a packed colunn at 293k and 1atm. Pure water is used for the absorption process. 1.5 times the minimum liquid flow rate is used in the column. The balance data of the system under operating conditions are given below. Colculate the column height since the height of a tronsfer unit is 0.44m on the basis of the eitire gos phase