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1. One pipe can fill a pool in 6 hours, and a second pipe can fill the same pool in 12 hours. If both pipes work together, how long will it take to fill the pool?
- A. 3 hours
- B. 3 hours
- C. 3 hours
- D. 3 hours
Answer: Option C
Explanation:
First pipe can fill 1/6 of the pool in an hour
Second pool can fill 1/12 of the pool in an hour
Together they can fill (1/6 + 1/12) or 1/4 of the pool in an hour
So, they can fill the pool completely in 4 hours.
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