Mixing Problem

Q'= Rate in - Rate Out

A 500 Gallon Tank is filled with 200 gallons of pure water. A spout is opened above the tankin a salt solution containing 2 pounds per gallon of solution, flowing in to a rate of 3 gallonsper minute. Simultaneously a drain is opened up at the bottom of the tank allowing the well-stired mixturesolution to leave the tanks at a rate of 2 gallons per minute, findd the amount of salt in the tankas it's about to overflow.

2 lbs of salt per gallon 3 gallons per minute How much salt in the tank as it's about to overflow? 200 gallons pure water 2 gallons per minute 500 Gallon Tank