Two tanks in a factory each contain about 50,000 gallons of liquid A. The foreman should have added 5 gallons of liquid B to each tank at 10 am. Instead, he dumped all 10 gallons of liquid B into one of the tanks. Motors keep the two tanks stirred, and pumps circulate liquid between the two tanks at 100 gallons per minute. What time will it be before the number of gallons of liquid B in the two tanks is 5.5 and 4.5 gallons respectively?

Question

Two tanks in a factory each contain about 50,000 gallons of liquid A.  The foreman should have added 5 gallons of liquid B to each tank at 10 am.  Instead, he dumped all 10 gallons of liquid B into one of the tanks.  Motors keep the two tanks stirred, and pumps circulate liquid between the two tanks at 100 gallons per minute.  What time will it be before the number of gallons of liquid B in the two tanks is 5.5 and 4.5 gallons respectively?