CET Pipes and Cisterns Questions with Solutions
All 26 Pipes and Cisterns questions from MBA CET 2025 and 2026 papers. Tap Show answer, or open the detailed solution (free login). Page 1 of 6.
Three pipes X, Y and Z can fill a tank completely in 24 minutes, 12 minutes and 8 minutes respectively.
All three pipes are opened together when the tank is empty.
- Pipe X fills solution A
- Pipe Y fills solution B
- Pipe Z fills solution C
After 4 minutes, what is the proportion of solution C in the tank?
- 1/2
- 1/4
- 1/3
- 2/3
- 3/4
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Answer: A. 1/2
Two pipes A and B together can fill a cistern in 4 hours. Had they been opened separately, then B would have taken 6 hours more than A to fill the cistern. How much time will be taken by A to fill the cistern by itself?
- 8 hours
- 6 hours
- 10 hours
- 7 hours
- 4 hours
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Answer: B. 6 hours
Two outlet pipes P and Q are connected to a full tank. Pipe P alone can empty the tank in 12 minutes and pipe Q alone can empty it in 18 minutes.
If both pipes are opened together, how long will it take to empty the tank completely?
- 6.2 minutes
- 5.4 minutes
- 6.8 minutes
- 7.2 minutes
- 4.5 minutes
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Official CET answer: D. 7.2 minutes
Cetking's answer: B. 5.4 minutes — it differs from the official key; the detailed solution shows the working.
DIRECTION for the question: Solve the following question and mark the best possible option.
- 10 min 20 sec
- 11 min 45 sec
- 12 min 30 sec
- 14 min 40 sec
- 15 min 20 sec
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Answer: D. 14 min 40 sec
DIRECTION for the question: Solve the following question and mark the best possible option.
- 1:00 pm
- 2:00 pm
- 2:30 pm
- 3:00 pm
- 4:00 pm
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Answer: D. 3:00 pm