Pipes & Cisterns — practice questions, page 5
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A tank's inlet fills it in 4 hours. When the inlet was turned on, the outlet was accidentally left…Pipes A and B fill a tank in 10 and 12 hours, and pipe C empties it in 15 hours. A and B are…Pipes A, B and C fill a tank in 12, 15 and 20 hours. They are opened in turn for one hour each in…Pipes A and B fill a tank in 20 and 30 minutes. They are opened together, but A is shut 5 minutes…A housing society's 30,000-litre sump is filled by the municipal line at 250 litres per minute.…Pipe A fills a tank in 10 hours. Starting with the tank empty, A is opened; 2 hours later outlet B…Pipe A fills a tank in 15 minutes and pipe B in 20 minutes. Both are opened on the empty tank;…Tank X holds 1,200 litres and tank Y holds 1,800 litres. One pump fills X at 40 litres per minute…Tap A fills a tank in 6 hours, tap B in 8 hours, and drain C empties it in 12 hours. A is opened…Pipes A and B fill a tank in 8 and 12 hours, and pipe C empties it in 6 hours. A and B are opened…One pipe fills a tank 3 hours faster than a second pipe, and together they fill it in 2 hours. If…Pipes A and B fill a tank in 18 and 27 hours. Both run together, except that every third hour B is…Pipes A, B and C fill a tank in 10, 15 and 30 hours. All three are opened together; A is closed…An inlet fills a tank in 6 hours and an outlet empties it in 9 hours. The inlet stays open, while…A municipal pipeline supplies 450 litres in 15 minutes. How many litres does it supply in one hour?A drain removes one-eighth of the water in a full tank every 30 minutes. How long does the full…An inlet fills a cistern in 2 hours. What fraction of the cistern does it fill in 50 minutes?Four taps of the same size fill a tank in 3 hours. How long would two such taps take?If a tap fills a tank in 1 hour 20 minutes, how many minutes does it take to fill half the tank?Pipe X can fill a tank in 3 hours and pipe Y in 2 hours 30 minutes. If both run together, in how…Eight identical taps fill a water tank in 27 minutes. How many minutes would 12 such taps take?Drain A empties a full tank in 20 minutes and drain B empties it in 30 minutes. If both are opened…A tank with a capacity of 2,250 litres is filled by a pipe in 1 hour 15 minutes. How many litres…The 960-litre tank in the figure is half full when both pipes are opened. How long until it is full?Pipe A can fill a tank in 45 minutes, and pipe B takes 50% more time than A. Together, how long do…
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