Answer:
3.5 GPM (Gallons Per Minute)
Explanation:
In order to do this equation you divide the first value by the second value, which necissitates the equation:
10.5 gallons divided by 3 hours.
This then equals 3.5 gallons in one hour.
3.5
Divide 10.5 by 3.
Hope this helps! :)
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