Pipes and Cisterns Problems Practice Question and Answer
8 Q: A tap can fill a tank in 6 hours. After half the tank is filled, three more similar taps are opened. What is the total time taken to fill the tank completely?
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5d7f1c46fb24f90208636734- 14 hrsfalse
- 24 hrs15 minfalse
- 33 hrs 15 minfalse
- 43 hrs 45 mintrue
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Answer : 4. "3 hrs 45 min"
Q: 20 buckets of water fill a tank when the capacity of each bucket is 14.5 litres. How many buckets will be required to fill the same tank if the capacity of each bucket is 10 litres?
6481 0608fbfdd7748471dd98d3400
608fbfdd7748471dd98d3400- 131false
- 229true
- 332false
- 430false
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Answer : 2. "29"
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?
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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:
1202 060531c57a01bc44789ae2f78
60531c57a01bc44789ae2f78- 136 hoursfalse
- 242 hoursfalse
- 348 hourstrue
- 440 hoursfalse
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Answer : 3. "48 hours"
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?
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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
912 060055150f5c84e74406111e4
60055150f5c84e74406111e4- 13 hoursfalse
- 24 hoursfalse
- 31 hoursfalse
- 42 hourstrue
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Answer : 4. "2 hours"
Q: One fill pipe A takes 3 minutes more to fill the cistern than two fill pipes A and B opened together to fill it. Second fill pipe B takes $$ {21{1\over 3}}$$ minutes more to fill cistern than two fill pipes A and B opened together to fill it. When will the cistern be full if both pipes are opened simultaneously?
2384 05fd31765d82ef86315b68770
5fd31765d82ef86315b68770- 17 minutesfalse
- 216 minutesfalse
- 38 minutestrue
- 410 minutesfalse
- 512 minutesfalse
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Answer : 3. "8 minutes"
Q: Three pipes, A B and C, can fill a cistern in 12, 18 and 24 minutes, respectively. If all the pipes are opened together for 7 minutes, what will be the volume of the water that overflows as the percentage of the total volume of the cistern?
948 05fc0dec0a96c23701f169628
5fc0dec0a96c23701f169628- 1$$ {23{2\over 3}}$$false
- 2$$ {26{5\over 18}}$$false
- 3$$ {23{1\over 3}}$$false
- 4$$ {26{7\over 18}}$$true
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