Pipes and Cisterns Practice Question and Answer

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 0

  • 1
    7 minutes
    Correct
    Wrong
  • 2
    16 minutes
    Correct
    Wrong
  • 3
    8 minutes
    Correct
    Wrong
  • 4
    10 minutes
    Correct
    Wrong
  • 5
    12 minutes
    Correct
    Wrong
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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 0

  • 1
    $$ {23{2\over 3}}$$
    Correct
    Wrong
  • 2
    $$ {26{5\over 18}}$$
    Correct
    Wrong
  • 3
    $$ {23{1\over 3}}$$
    Correct
    Wrong
  • 4
    $$ {26{7\over 18}}$$
    Correct
    Wrong
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Answer : 4. "$$ {26{7\over 18}}$$"

Q:

Pipes P and Q can fill a tank in 18 and 27 minutes, respectively, whereas Pipe R can empty the full tank in 54 minutes.  P and Q were opened together for 6 minutes and then   closed and R was opened. The tank was emptied by R alone in :

1499 0

  • 1
    35 minutes
    Correct
    Wrong
  • 2
    45 minutes
    Correct
    Wrong
  • 3
    30 minutes
    Correct
    Wrong
  • 4
    40 minutes
    Correct
    Wrong
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Answer : 3. "30 minutes"

Q:

Two pipe can fill a cistern in 3 hours and 4 hours respectively and a waste pipe can empty it in 2 hours. If all  the three pipes are kept open, then the cistern will be filled in

992 0

  • 1
    5 hours
    Correct
    Wrong
  • 2
    8 hours
    Correct
    Wrong
  • 3
    10 hours
    Correct
    Wrong
  • 4
    12 hours
    Correct
    Wrong
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Answer : 4. "12 hours"

Q:

Three pipes A, B and C can fill a cistern in 6 hours. After working at it together for 2 hours, C is closed and A and B can fill the remaining part in 7 hours. The time taken by C alone to fill the cistern is_

1105 0

  • 1
    10 hours
    Correct
    Wrong
  • 2
    12 hours
    Correct
    Wrong
  • 3
    14 hours
    Correct
    Wrong
  • 4
    16 hours
    Correct
    Wrong
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Answer : 3. "14 hours"

Q:

A cistern can be filled by two pipes A and B in 4 hours and 6 hours respectively. When full, the tank can be emptied by a third pipe C in 8 hours. If all the taps be turned on at the same time, the cistern will be full in 

1383 0

  • 1
    $$ {2}{2\over 7}{\ hours}$$
    Correct
    Wrong
  • 2
    $$ {3}{3\over 7}{\ hours}$$
    Correct
    Wrong
  • 3
    $$ {4}{3\over 7}{\ hours}$$
    Correct
    Wrong
  • 4
    $$ {2}{5\over 7}{\ hours}$$
    Correct
    Wrong
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Answer : 2. "$$ {3}{3\over 7}{\ hours}$$"

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Answer : 2. "96"

Q:

A tap drips at a rate of one drop/sec. 600 drops make 100ml. The number of litres wasted in 300 days is: 

2174 0

  • 1
    43200 litres
    Correct
    Wrong
  • 2
    4320 litres
    Correct
    Wrong
  • 3
    4320000 litres
    Correct
    Wrong
  • 4
    432000 litres
    Correct
    Wrong
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Answer : 2. "4320 litres"

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