A tank contains 400 gallons of brine (salt in solution) in which125 pounds of salt has been dissolved. Freshwater (with no saltadded) runs into the tank at a rate of 4 gallons per minute, andthe stirred mixture is drained from the tank at the same rate. (1)Find the amount of salt in the tank after an hour. (2) How longdoes it take to reduce the amount of salt in the tank to 10pounds?
