Pipes & Cisterns — practice questions, page 2
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A single pipe fills a tank in 6 hours. When the tank is half full, three more pipes of the same…Pipe A fills a tank in 3 minutes; pipe B empties it in 6 minutes. Starting with A, they are opened…Pipes A, B and C together fill a tank in 6 hours. After 2 hours C is closed, and A and B fill the…Pipe A fills a tank 8 minutes faster than pipe B. Together they fill it in 3 minutes. How long…Pipes A, B and C fill a tank in 10, 12 and 15 hours. A stays open throughout, while B and C are…Three pipes fill a tank. The first two together take as long as the third alone. The second fills…A cistern has pipes A and B that fill it in 3 hours and 4 hours, and pipe C that empties it in 1…With the motor running, the overhead tank in Kavita's house fills in 5 hours. After 2 hours of…A drain empties the full water cooler of a school canteen in 40 minutes. How long will it take to…Two taps, each able to fill a bucket in 6 minutes on its own, are opened together over the same…In one minute pipe X fills 1/12 of a tank and pipe Y fills 1/24 of it. Working together, how long…Pipe M fills a tank in 10 hours. How much of the tank does it fill in 45 minutes?A tap fills a tub in 12 minutes, and the tub's plug-hole, if left open, empties a full tub in 12…Both inlets in the figure are opened on the empty tank. How long will it take to fill?An inlet fills a sump in 25 minutes and an outlet drains it in 50 minutes. Opened together on the…Six equal pipes fill a swimming pool in 20 hours. If only four of them are used, how long will the…Taps A, B and C fill a tank in 10, 20 and 30 minutes respectively. If all three are opened…An overhead tank holds 3,600 litres. Pipe A delivers 30 litres per minute and pipe B delivers 50…A pipe fills 2/5 of a tank in 8 minutes. How long would it take to fill the whole tank?The table shows how long each pipe takes on its own to fill the same tank. Which pair, opened…Pipe A fills a tank in 16 minutes and pipe B in 24 minutes. Both start together, but B is shut…A cistern can be filled by a tap in 4 hours and emptied by an outlet in 6 hours. The cistern is…Pipe A is 25% faster than pipe B. Together they fill a tank in 20 hours. How long would A take…Pipes A and B fill a tank in 12 and 16 hours. B is opened 2 hours after A. Counting from when A…All three pipes in the figure are opened on the empty tank. How long will it take to fill?
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