We plan the journey from pints to gallons pints --> quarts --> gallons 2 pints makes 1 quart, and 4 quarts makes one gallon We plan the journey from minutes to hours. That's easy: minutes --> hours. 60 minutes makes 1 hour.Cancel the pt's Cancel the qt's Cancel the min's You are left with Cancel the 2's which reduces to or 15 gal/hr. Edwin