Time and work is a basic concept in quantitative aptitude that is often tested in government exams. It is the basis of how work gets done at a particular time.  Here are some formulas for time and work: Work Done = Time Taken × Rate of Work Rate of Work = 1 / Time Taken Time Taken = 1 / Rate of Work Total Work Done = Number of Days × Efficiency W = NXD W = M × D  Here are some tips for time and work problems: Ratios of wages of individuals doing work are directly proportional to the ratio of the efficiency of the same individuals. If X is three times better than Y, then in any given... Show more

Time and work is a basic concept in quantitative aptitude that is often tested in government exams. It is the basis of how work gets done at a particular time. 

Here are some formulas for time and work:
Work Done = Time Taken × Rate of Work
Rate of Work = 1 / Time Taken
Time Taken = 1 / Rate of Work
Total Work Done = Number of Days × Efficiency
W = NXD
W = M × D 

Here are some tips for time and work problems:
Ratios of wages of individuals doing work are directly proportional to the ratio of the efficiency of the same individuals.
If X is three times better than Y, then in any given amount of time, X will complete 3 times more work than Y.
Time and work are related to indirect proportion.
If W can complete 1n of work in 1 day, then W will take n days to complete the whole work. 

Related Test: Quantitative Aptitude Practice Test: Time and Work

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Quantitative Aptitude Practice Test: Time and Work 2

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25 Questions

1. 8 men and 15 women do a job in 6 days, 12 men and 10 women do in 5 days. 3 men are equal to women.

910118

2. A, B and C do a job in 80, 60, 40 days. They together work for 10 days when A leaves. Remaining job will be completed by B & C together in how many days.

111610

3. 6 men and 8 boys earn Rs. 4640 in 8 days. 9 men and 16 boys earn Rs. 10100 in 10 days. 14 men and 18 boys shall earn Rs. 13300 in how many days.

96108

4. For 42 days a provision was made in a camp for certain number of men. On the morning of 11th day – even before the ration could be distributed - 1300 more persons joined them and food now lasted only for 24 days. How many were there in the camp on the 1st day?

2600300024003900

5. P does half of a job in 4 days. Q does 1/3 of the job in 4 days. Both shall do 1/3 of that job in how many days?

1.62.41.41.9

6. A contractor undertook to do a piece of work in 9 days. He employed certain number of labourers but 6 of them remained absent from the very first day, the rest could finish the work in 15 days. Find the number of men originally employed.

13156none of these.

7. A does a job in 4 hours. B does the same in 6 hours, C completes it in 8 hours. Jointly they shall complete the entire job in _____ approximate hours.

1122

8. From the above question A alone shall do the job in _____ days

53616

9. If two taps can fill a tank in 40 and 30 minutes respectively and the third pipe can empty it in 20 minutes. If the three pipes are opened together one half of the tank will fill in how many minutes

90 minutes45 minutes60 minutes120 minutes

10. A and B can do a job in 6 days. B and C can do it in 8 days. C and A can do it in 12 days. All of them shall do the job in _____ days

35.3311.5

11. From the above question in how many days shall B alone do the job?

15302025

12. A tap can fill a tank in 30 hours. Another can empty it in 50 hours. Both taps being open, in how many hours the empty tank shall be filled once.

80607550

13. Manav does 3/5 job in 20 days. He shall do full job in how many days?

33361230

14. A and B can alone do a job in 21 and 14 days respectively. Both started the job together but A leaves 3 days before the job is over. They together had continued for how many days?

6978

15. X can copy 180 pages of a book in 20 hours. Both X and Y together can copy 350 pages in 25 hours. Y can copy 80 pages in how many hours?

10121618

16. 5 men or 11 women do a job in 16 days. 3 men and 4 women shall do it in days

25152022

17. Two taps can fill a tank jointly in 5 hours. One can fill one-third of the tank in 2 hours. The other shall fill the entire tank in _____ hours.

30123516

18. Ten men could paint 10 pictures in 10 days. How many men are required to paint 100 pictures in 100 days?

1001011000

19. If fifty men could do a job working 8 hours a day finishing in12 days. Then ten men more would have to work for how many more hours a day a job-double in size-given 4 more days contract.

4213

20. A is twice efficient as B. A does it in 8 days. B does it in days.

481216

21. A and B can do a job in 15 days. B and C can do the job in 12 days. All of them do the same job in 10 days. C and A both shall take _____ days to finish the job.

18152024

22. It costs Rs. 19 in printing a book with 11 words in each line of 320 pages each page containing 21 lines. How much shall it cost if the new book has 297 pages of 28 lines containing 10 words in each line?

18.3722.3719.3721.37

23. 18 men shall complete a job independently in how many days. Given that the same job is finished by 12 boys in 18 days. It is further known that 3 boys work as much as 2 men.

101268

24. A and B together can do a job in 45 days. B and C can do together in 60 days. C and A can jointly do it in 50 days. A alone shall do it in how many days?

70786065

25. If in a fort 2000 men have a provision for 12 days. Then how long will the provision last now if 400 more men join the fort strength.

1012168