If Patricia has 4 barrels and each barrel has 7 gallons, then in total she needs 4*7=<<4*7=28>>28 gallons

If the faucet can provide 3.5 gallons every minute, then she will need 28/3.5=<<28/3.5=8>>8 minutes to fill all 4 barrels

# Answer

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<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Patricia has 4 barrels of 7 gallons each. All of them are empty, and there's only one faucet with a flow rate of 3.5 gallons per minute. How many minutes will it take to fill all 4 barrels?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
8
Patricia has 4 barrels of 7 gallons each. All of them are empty, and there's only one faucet with a flow rate of 3.5 gallons per minute. How many minutes will it take to fill all 4 barrels?
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