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Time, Work, Efficiency & Pipes-Cisterns quiz

All 8 questions in this topic, marked as in the Prelims: +1 for a right answer, −0.25 for a wrong one, 0 if you leave it.

8 questions

  1. Question 1 of 8
    Pipe P and Q can fill a tank alone in 16 minutes and 20 minutes respectively. Both pipes are opened together, but P is closed 8 minutes before the tank gets filled. Find the total time taken to fill the tank.
  2. Question 2 of 8
    A man works thrice as fast as a woman. A woman works thrice as fast as a boy. If 15 men can complete a work in 18 days, how many days would be required by 44 women and 30 boys together to complete the same work?
  3. Question 3 of 8
    In the following question, two statements are numbered as A and B. On solving these statements, we get quantities A and B respectively. Solve both quantities and choose the correct option.
    Quantity A: A can do a piece of work in 10 days and B can do the same work in 15 days. They start working together and after 4 days, A left the work. Find in how many days the total work will be completed.
    Quantity B: P can do a piece of work in 15 days and Q can do the same work in 25 days. They start working together and after 5 days, Q left the work. Find in how many days the remaining work will be completed.
  4. Question 4 of 8
    Two pipes A and B can fill a tank in 24 minutes and 32 minutes respectively. Both pipes are opened together, but pipe A is closed after some time, and pipe B continues until the tank is completely filled in a total of 18 minutes. For how long was pipe A open?
  5. Question 5 of 8
    A, B and C together can complete a piece of work in 12 days. B alone can complete it in 30 days and C alone in 40 days. In how many days can A alone complete the work?
  6. Question 6 of 8

    A pump can be used for filling as well as emptying a tank. The capacity of the tank is 3000 m³. The emptying capacity of the tank is 15 m³ per minute higher than its filling capacity, and the pump needs 10 minutes less to empty the tank than it needs to fill it. What is the emptying capacity of the tank?

  7. Question 7 of 8

    A alone can do a work in 20 days. B is 125% more efficient than A. A and B started working together and worked for 4 days. C alone completed the remaining job in 22 days. How many days would C alone take to complete the entire job?

  8. Question 8 of 8
    A is 20% more efficient than B who is 25% more efficient than C. If A at his 40% efficiency can complete a work in 60 days, then in how many days will B and C together complete the work?

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