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- Find each pipe's rate.
- Add filling rates and subtract emptying rates.
- Invert the net rate to get time.
Correct Answer: B
Correct Answer: B
Method / Topic: Pipes and Cisterns
The answer uses the net filling rate.
Short Explanation
Detailed Explanation
Correct Answer: B
Method / Topic: Pipes and Cisterns
Combined rate = 1/8+1/12 = 3/24+2/24=5/24 tank per hour. Time = 24/5=4.8 hours.
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Learn + Solve: Shortcut, Trap & Fast Route Click to view shortcut, steps, and common mistake
Shortcut used, common trap, and the fastest solving route
- Find each pipe's rate.
- Add filling rates and subtract emptying rates.
- Invert the net rate to get time.
One pipe fills a tank in 8 hours and another fills it in 12 hours. How long will they take together?
Explanation
Correct Answer: B
Method / Topic: Pipes and Cisterns
The answer uses the net filling rate.
Short Explanation
Detailed Explanation
Correct Answer: B
Method / Topic: Pipes and Cisterns
Combined rate = 1/8+1/12 = 3/24+2/24=5/24 tank per hour. Time = 24/5=4.8 hours.
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