Answer:
1:12 2:24 3:36 4:48 so on so forth
Step-by-step explanation: Basically every minute you get 12 gallons of water, and you get a gallon every 20 seconds.
12 gallons per minute and 1/12 minutes per gallon.
36/3 for gallons per min
12:1 24:2 36:3 48:4 60:5 72:6
3/36 for mins per gallon
1:12 2:24 3:36 4:48 5:60 6:72
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