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Time and Work

Time and Work: Time and Work Problems, Time and Work Formula, Time and Work Questions with Tricks for answering them

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Online Aptitude Questions with Answers on Time and Work

Q21. **A can do a piece of work in 4 hours; B and C together can do it in 3 hours, while A and C together can do it in 2 hours. How long will B alone take to do it?**

  1.  8 hours
  2.  10 hours
  3.  12 hours
  4.  24 hours

Solution : 12 hours
Q22. **A can do a certain work in the same time in which B and C together can do it. If A and B together could do it in 10 days and C alone in 50 days, then B alone could do it in:**

  1.  15 days
  2.  20 days
  3.  25 days
  4.  30 days

Solution : 25 days

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Q23. **A does 80% of a work in 20 days. He then calls in B and they together finish the remaining work in 3 days. How long B alone would take to do the whole work?**

  1.  23 days
  2.  37 days
  3.  75/2 days
  4.  40/3 days

Solution : 75/2 days
Q24. **A machine P can print one lakh books in 8 hours, machine Q can print the same number of books in 10 hours while machine R can print them in 12 hours. All the machines are started at 9 A.M. while machine P is closed at 11 A.M. and the remaining two machines complete work. Approximately at what time will the work (to print one lakh books) be finished ?**

  1.  11:30 A.M.
  2.  12 noon
  3.  12:30 P.M.
  4.  1:00 P.M.

Solution : 1:00 P.M.

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Q25. **A can finish a work in 18 days and B can do the same work in 15 days. B worked for 10 days and left the job. In how many days, A alone can finish the remaining work?**

  1.  5
  2.  11/2
  3.  6
  4.  8

Solution : 6
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