- A22 min
- B12 min
- C18 min
- D10 min
Step-by-Step Solution
8 min together: . P fills in 10 min. Total 18 min. (10 min is only P's last stage; 12 min is both throughout.)
Answer: C) 18 min
Starting together on an empty tank, pipe P (fills it in 30 minutes) runs throughout, while pipe Q (fills it in 20 minutes) is turned off after 8 minutes. Find the total time to fill the tank.
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