- A5 hours
- B10 hours
- C7 1/2 hours
- D6 hours
Step-by-Step Solution
The two slow pipes equal one fast pipe: in effect 2 fast pipes, so hours.
Answer: C) 7 1/2 hours
A pipe can fill a pool in 15 hours. Two pipes, each half as fast, are added. How long do all three take?
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