An effluent air stream contains 5.4 percent SO2 by volume. It is desired to reduce this concentration to 1000 ppm by passing the gas stream through a packed tower before releasing the flow the atmosphere. The inlet-gas flow rate is 1000 ft3/min measured at 1 atm and 68℉, and the absorber is counterflow. The equilibrium of SO2 in water is assumed to be reasonably represented by the relation y=30x. Estimate the minimum amount of water required as a solvent, in cubic feet per minute.