A tank initially contains 60 gallons of pure water. Brine containing 1 lb of salt per gallon enters the tank at 2 gal/min, and the perfectly mixed solution leaves the tank at 3 gal/min; thus the tank is empty after exactly 1 hour.

I am asked to

A) Find the amount of salt in the tank aftertminutes

B) What is the maximum amount of salt ever in the tank

I am confused as to how to set this up and then after I set it up how would I determin B?

Thanks