Time and Work is an important topic of mathematics for all Competitive Exams. You can certainly find a no of questions in all of them. So without wasting any moment, check you preparation regarding with Time and Work topic.
Practice Set Regarding Time and Work 
Q. 1. A and B can finish a field work in 30 days. B and C in 40 days while C and A in 60 days. How long will they take to finish it together ?
Q. 2. A can copy 75 pages in 25 hrs. A and B together can copy 135 pages in 27 hrs. In what time can B copy 42 pages ?
Q. 3. A, B and C can finish a work in 10, 12 and 15 days respectively. If B stops after 2 days, how long would it take A and C to finish the remaining work ?
Q. 4. A can do a work in 7 days. If A does twice as much work as B in a given time, find how long A and B would take to do the work ?
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Q. 5. If 3 men or 5 women can reap a field in 43 days, how long will 5 men and 6 women take to reap it ?
Time and Work
Q. 6. One man, 3 women and 4 boys can do a work in 96 hrs; 2 men and 8 boys can do it in 80 hrs ; and 2 men and 3 women can do it in 120 hrs. In how many hours can it be done by 5 men and 12 boys ?
Q. 7. A and B working separately can do a piece of work in 9 and 12 days respectively. If they work for a day alternately, A beginning, in how many days will the work be completed ?
Q. 8. A does half as much work as B in threefourth of the time. If together they take 18 days to complete a work, how much time shall B take to do it ?
Q. 9. 2 men and 3 women can finish a piece of work in 10 days, while 4 men can do it in 10 days. In how many days will 3 men and 3 women finish it ?
Q. 10. 8 children and 12 men complete a certain piece of work in 9 days. If each child takes twice the time taken by a man to finish the work, in how many days will 12 men finish the same work ?
Answers  1. 26 2/3 days 2. 21 hrs 3. 2 8/11 days 4. 4 2/3 days 5. 15 days 6. 43 7/11 hrs 7. 10 1/4 days 8. 30 days 9. 8 days 10. 12 days
I think answer of Q3. Is wrong. It should be 3 days