A tank measures 2.4 m by 1.5 m by 1 m. A pipe delivers 20 litres of water per minute. How long will it take to fill the empty tank?
Correct answer A. 3 hours
Topic / 57 questions
Pipes and Cistern MCQs
Page 2 of Pipes and Cistern multiple-choice questions with answers. Tap an option to check yourself.
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Pipes A and B fill a tank in 12 minutes and 16 minutes, and pipe C empties it in 8 minutes. If all three are opened on an empty tank, when will it be full?
Correct answer A. 48 minutes
Pipe A fills a tank in 24 minutes and pipe B in 40 minutes. A is opened first, and after 8 minutes B is also opened. What is the total time taken to fill the tank?
Correct answer C. 18 minutes
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Pipes A and B can fill a tank in 45 minutes and 36 minutes. Both are opened together, and B is closed at some point so that the tank is full in 30 minutes. How many minutes before the tank is full was B closed?
Correct answer C. 18 minutes
An inlet fills a tank in 3 hours and an outlet empties it in 4 hours. Starting with the inlet, they are opened alternately for one hour each. After how many hours will the empty tank first be full?
Correct answer D. 17 hours
Three pipes fill water at rates in the ratio 2 : 3 : 5. Together they fill a tank in 3 hours. How long would the slowest pipe alone take?
Correct answer B. 15 hours
A leak can empty a full cistern in 6 hours. When an inlet supplying 4 litres per minute is opened, the full cistern takes 9 hours to empty. What is the capacity of the cistern?
Correct answer B. 4320 litres
A pipe fills a tank in 1 hour 20 minutes. What fraction of the tank will it fill in 32 minutes?
Correct answer C. 2/5
Pipes A and B fill a tank in 18 minutes and 27 minutes. How long do they take together?
Correct answer B. 10.8 minutes
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A cistern is 3/4 full. An outlet can empty the full cistern in 12 minutes and an inlet can fill it in 18 minutes. If both are opened, how long will the cistern take to empty?
Correct answer B. 27 minutes
Pipe B fills a tank twice as fast as pipe A. Together they fill it in 10 minutes. How long would A alone take?
Correct answer B. 30 minutes
Two pipes can fill a tank in 18 minutes and 36 minutes. A waste pipe removes 5 litres per minute. With all three open, the tank fills in 16 minutes. What is the capacity of the tank?
Correct answer A. 240 litres
A pipe pours water into an empty 1200-litre tank at 15 litres per minute, while a leak loses 5 litres per minute. How long will the tank take to fill?
Correct answer D. 2 hours
Two pipes can fill a tank in 9 hours and 12 hours. Both are opened together, and after 3 hours the first pipe is closed. How much more time will the second pipe take to fill the tank?
Correct answer C. 5 hours
Pipes A and B can fill a tank in 24 minutes and 32 minutes respectively. Both are opened, and B is closed after some time so that the tank is full in exactly 18 minutes. For how many minutes was B open?
Correct answer A. 8 minutes
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Pipes A and B together fill a tank in 6 hours. A alone fills it in 10 hours. How long would B alone take?
Correct answer C. 15 hours
A tap fills a tank in 8 hours, but because of a leak it takes 10 hours. How long would the leak take to empty the full tank?
Correct answer A. 40 hours
Three pipes can fill a tank in 10, 15 and 30 hours respectively. How long will all three together take to fill it?
Correct answer A. 5 hours
An inlet pipe fills a cistern in 20 minutes and an outlet pipe empties it in 30 minutes. If both are opened on an empty cistern, when will it be full?
Correct answer D. 60 minutes
Pipe A can fill a tank in 12 hours and pipe B in 18 hours. If both are opened together, how long will they take to fill the empty tank?
Correct answer C. 7 hours 12 minutes