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Two pipes A & B can fill a tank in 8 min & 12 min respectively. Both the pipes are opened together but after 3 min, pipe A is turned off. What is the remaining time required to fill the tank?

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HPCL Engineer Civil 23 Dec 2023 Official Paper
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  1. 4.5 
  2. 5
  3. 4
  4. 3.5

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Option 1 : 4.5 
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More Pipe and Cistern Questions

Q1.A cistern has an inlet pipe and an outlet pipe. Inlet pipe can fill three-fourth of the cistern in 24 minutes while outlet pipe can empty the one-third filled cistern in 16 minutes. If both the pipes are opened together, then the cistern will be completely filled in-
Q2.Pipe A can empty a tank in 48 minutes, Pipe B can fill the same tank in 72 minutes and Pipe C can fill the same tank in 96 minutes. If all three pipes are opened together, how many minutes will it take to fill the empty tank? 
Q3.Pipe A can fill a tank in 771 minutes and Pipe B can fill the same tank in 1542 minutes. If both pipes are opened together, how many minutes will it take to fill the empty tank?
Q4.Two pipes fill the tank in 711 minutes and 1185 minutes. There is also a leak pipe in the tank. When all the three are opened, the empty tank is filled in 474 minutes. How many minutes will the leak pipe take to empty the tank?
Q5.A pipe can fill a tank in 6 hours, and another pipe can fill the same tank in 8 hours. If both pipes are opened at the same time, how long (in hours, rounded off to one decimal place) will it take to fill the tank?
Q6.A pipe can fill a tank in 9 hours. Another pipe can empty the filled tank in 27 hours. If both the pipes are opened simultaneously, then the time (in hours) in which the tank will be two-third filled, is:
Q7.Pipes A and B can empty a full tank in 5 hours and 12 hours respectively and another pipe C can fill the empty tank in 2 hours. If all the three pipes are opened together, then
Q8.One pipe fills a water tank 3 times faster than the other. If the two pipes together can fill the empty tank in 37 minutes, then how much time will the slower pipe alone take to fill the tank?
Q9.Two pipes A and C can fill a tank in 10 hours and 15 hours respectively. If A is open all the time and C is open for 30 minutes, then find the time needed for the tank to be filled.
Q10.A pipe can fill a tank in 6 hours. Another pipe can empty the filled tank in 30 hours. If both the pipes are opened simultaneously, then the time (in hours) in which the tank will be two-third filled, is:

More Time and Work Questions

Q1.A cistern has an inlet pipe and an outlet pipe. Inlet pipe can fill three-fourth of the cistern in 24 minutes while outlet pipe can empty the one-third filled cistern in 16 minutes. If both the pipes are opened together, then the cistern will be completely filled in-
Q2.A and B together complete a work in 20 days. B alone complete the work in 30 days. Find in how many days A alone complete the work?
Q3.A and B together complete a work in 24 days, A alone complete the work in 60 days. C takes 10 days less than the B takes to complete the work alone. Find the time taken by A, B and C together to complete 3/4th part of the work?
Q4.Tom can alone complete the work in 8 days while Tom & Jerry together can complete the same work in 2(2/3) days. Find the number of days required by Jerry alone to complete double work.
Q5.Pipe A can empty a tank in 48 minutes, Pipe B can fill the same tank in 72 minutes and Pipe C can fill the same tank in 96 minutes. If all three pipes are opened together, how many minutes will it take to fill the empty tank? 
Q6.X can finish a job in 131 days. He worked for 47 days alone and the remaining work was completed by Y in 84 days. How many days would both together take to complete the entire job?
Q7.Pipe A can fill a tank in 771 minutes and Pipe B can fill the same tank in 1542 minutes. If both pipes are opened together, how many minutes will it take to fill the empty tank?
Q8.Two pipes fill the tank in 711 minutes and 1185 minutes. There is also a leak pipe in the tank. When all the three are opened, the empty tank is filled in 474 minutes. How many minutes will the leak pipe take to empty the tank?
Q9.A and B can do a piece of work in 43 days and 3 days, respectively. The number of days [Correct to one decimal place] required to complete the work if both A and B work together is:
Q10.A pipe can fill a tank in 6 hours, and another pipe can fill the same tank in 8 hours. If both pipes are opened at the same time, how long (in hours, rounded off to one decimal place) will it take to fill the tank?
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Q1.Perimeter of a rectangular field is equal to the perimeter of a triangular field whose sides are in the ratio 3:2:4 respectively. lf area of rectangular field is 500 m2 and sides are in the ratio 5:4 respectively, then calculate the longer side of the triangular field.
Q2.A cistern has an inlet pipe and an outlet pipe. Inlet pipe can fill three-fourth of the cistern in 24 minutes while outlet pipe can empty the one-third filled cistern in 16 minutes. If both the pipes are opened together, then the cistern will be completely filled in-
Q3.In a family, three sons were born for every 3 years one after the other. If the ratio of present ages of father and the eldest son is 15:7 and the average of the present ages of the 3 sons is 18 years. What will be the ratio of the ages of the father and the youngest son after 5 years?
Q4.Train A of length 80m while moving crosses a pole in 16 seconds. lf it is known that the lengths of train B and train A is in the ratio of 3:1, then how long would it take train B to cross a platform which is half the length of train A if the speed of train B is same as that of train A?
Q5.Can A and Can B contain a mixture of soda and water in the ratio of 5 : 3 and 7 : 2 respectively If soda and water are taken out in the ratio of P : Q from can A and B respectively to form a new mixture in which the ratio of soda and water is 12 : 5 respectively, then find the value Of P:Q?
Q6.A boat can covers a certain distance in upstream and same distance in downstream in total of 7 hours 48 minutes, If upstream speed of the boat is 62.5%. of downstream speed of the boat and speed of the stream is 3 km/h, what is the total distance covered by the boat?
Q7.M and R went for shopping and bought two sarees each at different cost. Cost price of saree bought by R is Rs.250 more than the cost price of saree bought by M. Shopkeeper earned a profit of 20% on selling both the sarees together to R and M which he bought them at total Rs.6000. At what cost did M buy saree?
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Q9.While calculating average marks of 60 students, the two digits of original marks of a student are written reversed and thereby average of marks is increased by 0.6 Find the difference between the two digits of marks of the student?  
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