- A2.25 h
- B3.75 h
- C6 h
- D5 h
Step-by-Step Solution
In 3 h: . Left , at per hour: h. (6 h is 9 − 3.)
Answer: B) 3.75 h
Two pipes fill a tank in 9 hours and 12 hours. Both are opened, and after 3 hours the slower one is closed. How long does the faster pipe then take to finish?
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