Question 7029 of 229 · California Water Distribution Operator Exam
A 120,000 gallon tank has 200 gpm flowing in and 700 gpm flowing out. How many hours until the full tank is empty?
Exactly one answer is correct.
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Correct answer to question 7029
- B: 4 hours
Explanation
Net outflow = 700 - 200 = 500 gpm. Time = 120,000 / (500 x 60 min/hr) = 4 hours. Using only the outflow gives 2.9 hours.
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