Pipes and Cisterns Practice Question and Answer
8 Q: A pipe can fill a tank in 72 minutes. But there is a leak in the bottom of the tank due to which the tank is filled in 18 minutes more. Find in how many hours the leak can empty a full tank ?
943 06064222acfdbf24a556220af
6064222acfdbf24a556220af- 17 hrsfalse
- 26.5 hrsfalse
- 39 hrsfalse
- 46 hrstrue
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Answer : 4. "6 hrs"
Q: Four pipes P, Q, R and S can fill a cistern in 25, 20, 50 and 40 hours respectively. The pipe Q was opened at 7 pm, P at 9 pm, S at 10 pm and R at 11 pm. When will the cistern be full?
1197 06058684519447609ff030105
6058684519447609ff030105- 13 : 29 AMfalse
- 22 : 47 AMfalse
- 34 : 09 AMtrue
- 45 : 02 AMfalse
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Answer : 3. "4 : 09 AM"
Q: Pipes A and B are emptying pipes and can empty a tank in 6 hours and 16 hours, respectively. C is a filling a pipe. All the three pipes were opened together. They took 80 minutes to empty $$ {5\over 8}th$$ of the tank. Pipe C alone can fill the tank in:
1201 060531c57a01bc44789ae2f78
60531c57a01bc44789ae2f78- 136 hoursfalse
- 242 hoursfalse
- 348 hourstrue
- 440 hoursfalse
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Answer : 3. "48 hours"
Q: Pipes A and B together can fill a tank in 16 hours, whereas pipe C alone can empty the full tank in 24 hours. A and B were opened together for 10 hours and then closed. Pipe C was then opened. The tank will now be emptied by C in:
720 06051c40fa01bc44789a9abd2
6051c40fa01bc44789a9abd2- 118 hoursfalse
- 214 hoursfalse
- 316 hoursfalse
- 415 hourstrue
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Answer : 4. "15 hours"
Q: If 20 taps can fill a tank in 14 hours, then how many times will 35 taps fill that tank?
859 0602e04daa503a25a4b89e148
602e04daa503a25a4b89e148- 18 hourtrue
- 26 hourfalse
- 314 hourfalse
- 410 hourfalse
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Answer : 1. "8 hour"
Q: A cistern can be filled by two pipes filling separately in 12 and 16 min respectively. Both pipes are opened together for a certain time but being obstructions, only 7/8 of full quantity water flows through the former and only 5/6 through the latter pipe. The obstructions, however, being suddenly removed, the cistern is filled in 3 minutes from that moment. How long was it obstructions before the full flow began?
1378 0600e8c7f178b94051cdf8ca5
600e8c7f178b94051cdf8ca5- 14.5 mintrue
- 22.5 minfalse
- 33.5 minfalse
- 45.5 minfalse
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Answer : 1. "4.5 min "
Q: A pump can fill a cistern in 40 minutes and another pump can empty the filled up cistern in 1 hour. By mistake, without closing the second pump, the first pump is opened. The time in which the empty cistern will be filled up is
911 060055150f5c84e74406111e4
60055150f5c84e74406111e4- 13 hoursfalse
- 24 hoursfalse
- 31 hoursfalse
- 42 hourstrue
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Answer : 4. "2 hours"
Q: If all three pipes are opened for 2 minutes to fill the tank each alternatively in the sequence of A then C and then B. Calculate water filled by pipes A is what % of water filled by pipe C?
1524 05fd35c3ec46a213fc5c5b347
5fd35c3ec46a213fc5c5b347- 172.5 %false
- 275 %true
- 377.5 %false
- 480 %false
- 582.5 %false
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