Liquid water at 120°F and a mass flow rate of 3 ×105 lb/h enters a cooling tower operating at steady state. Liquid water exits the tower at 80°F. No makeup water is provided. Atmospheric air enters at 1 atm with a dry-bulb temperature of 70°F and a wet-bulb temperature of 60°F. Saturated air exits at 110°F, 1 atm. Ignoring kinetic and potential energy effects, determine the mass flow rate of the cooled water stream exiting the tower, in lb/h.