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Time and Work in Aptitude MCQ Quiz (Multiple Choice Questions And Answers)

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16. A can do a piece of work in 12 days. When he had worked for 2 days B joins him. If the complete work was finished in 8 days. In how many days B alone can finish the work?

  • 18
  • 12
  • 9
  • 10

17. A and B together can do a work in 6 days. If A alone can do it in 15 days. In how many days can B alone do it?

  • 10
  • 5
  • 20
  • 15

18. A can do a piece of work in 15 days and B in 20 days. They began the work together but 5 days before the completion of the work, A leaves. The work was completed in?

  • 11
  • 12
  • 15
  • 11 3/7 days

19. A, B and C can do a piece of work in 24, 30 and 40 days respectively. They start the work together but C leaves 4 days before the completion of the work. In how many days is the work done?

  • 22 days
  • 5 days
  • 15 days
  • 11 days

20. A is thrice as efficient as B and is, therefore, able to finish a piece of work 10 days earlier than B. In how many days A and B will finish it together?

  • 10 days
  • 20 days
  • 15 days
  • 5 days