Work & Time

TIME AND WORK CLASS ROOM EXCERCISE

1. A alone can do a work in 12 days. B alone can do the same work in 20 days. How many days they will take to complete the same work together?

2. A and B together can do a work in 15 days. A alone can do this work in 20 days.B alone will complete the same wordk in how many days?

3. A,B and C can do a work in 10,12 and 15 days respectively. How many days they will take to complete the same work together?

4. A,B and C together can a work in 10 days.A alone can do the same work in 20 days and B alone can do the same work in 25 days.How many days C alone will take to complete the same work alone?

5. A,B and C can do a work in 15,20 and 12 days respectively.They start work together but after two days C left the work and after three days of that A left the work.In how many days B will do the remaining work alone?

6. A,B and C can do a work in 10,15 and 20 days respectively.They together start the work but after two days C left the work and after one day of that B also left the work and remaining work is completed by A.In how many days the whole work was completed?

7. 16 man can do a work in 24 days how many days 32 men will take to complete the same work?

8. 25man can do a work in 48 days.How many man will be required to complete the same in just 15 days?

9. 36 man can do a work in 16 days how many days 24 man will take to complete the same work?

10. 18 man can do a work in 42 days.How many man will be required to complete the same in just 12 days?

11. 2 man or 4 women can do a work in 18 days. How many days 3 man and 6 women will take to complete the same work?

12. 3 man  or 9 woman can do a work in 24 days how many days 2 man and 6 women will take to complete the same work?

13. 5 man  or 8 woman can do a work in 158 days how many days 8 man and 3 women will take to complete the same work?

14. 3 man or 7 woman can do a work in 172 days how many days 4 man and 5 women will take to complete the same work?

15. 2 man or 5 woman can do a work in 76 days how many days 3 man and 2 women will take to complete the same work?

16. 2 man or 3 woman or 5 children can do a work in 118 days than how many days 1 man and 2 woman and 4 children will take to complete the same work?

17. 1 man or 2 woman or 2 children can do a work in 64 days than how many days 2 man and 3 woman and 1 children will take to complete the same work?

18. 3 men or 2 women or 1 child can do a work in 46 days than how many days 1 man and 3 woman and 2 children will take to complete the same work?

19. 3 man and 4 woman can a work in 24 days than how many days 2 man and 5 woman will take to complete the same work?

20. 4 man and 5 woman can a work in 21 days than how many days 2 man and 3 woman will take to complete the same work if work of 2 women is equal to the work of 1 man?

21. 8 man and 5 woman can a work in 22 days than how many days 3 man and 2 woman will take to complete the same work if work of 3 women is equal to the work of 1 man?

22. 5 man and 8 woman can a work in 20 days and 3 man and 6 woman can a work in 30 days than how many days 4 man and 5 woman will take to complete the same work?

25. 3 man and 2 woman can a work in 12 days and 4 man and 5 woman can a work in 8 days than how many days 5 man and 1 woman will take to complete the same work?