- A13 2/5 minutes
- B13 1/2 minutes
- C14 minutes
- D13 minutes
Step-by-Step Solution
Pair: . 6 pairs (12 min): . Minute 13 (B): . Minute 14 (A) needs 2 of its 5: .
Answer: A) 13 2/5 minutes
Pipes A (12 min) and B (15 min) are opened alternately for 1 minute each, B first. How long does the tank take?
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