- A10 min
- B12 min
- C25 min
- D50 min
Step-by-Step Solution
per minute → 12 min. Two drains work together just like two inlets.
Answer: B) 12 min
Drain A empties a full tank in 20 minutes and drain B empties it in 30 minutes. If both are opened on a full tank, how long does it take to empty?
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