1 gallon = 4 quarts
He drinks 1 gallon in 6 days ( 2x3=6)
3 gallons x 6 days = 18 total days to drink 3 gallons.
Answer: 18 days
Step-by-step explanation: 2 quarts is half a gallon, so in 6 days, Art will drink one gallon. 3 times 6 is 18 so 18 days is the answer.
