Time & Work
1. A contractor employs 20 men to complete a job in 10 days, but find it half finished after 6 days. How many additional men will have to be engaged to complete the job in time?
a] 9 b] 8 c] 12 d] 10
a] 9 b] 8 c] 12 d] 10
2. In a day A does twice as much work as B does. If A takes 60 days less than the time B takes to complete the work, they together will complete the work in
a] 30 days b] 40 days c] 45 days d] 50 days
a] 30 days b] 40 days c] 45 days d] 50 days
3. 2 men and 5 boys together can finish the work in four days. While 3 men and 6 boys can finish it in three days, find the time taken by one boy alone to finish the work.
a] 46 days b] 35 days c] 45 days d] 36 days
a] 46 days b] 35 days c] 45 days d] 36 days
4. Running at the same constant rate, 6 identical machines can produce a total of 270 bottles per minute. At this rate, how many bottles could 10 such machines produce in 4 minutes?
a] 648 b] 1800 c] 2700 d] Sten 10,800
a] 648 b] 1800 c] 2700 d] Sten 10,800
5. Machine A produces bolts at a uniform rate of 120 every 40 seconds, and machine B produces bolts at a uniform rate of 100 every 20 seconds. If the two machines run simultaneously, how many seconds will it take them to produce a total of 200 bolts?
a] 22 b] 125 c] 28 d] 32
a] 22 b] 125 c] 28 d] 32
6. 30 men can produce 1500 units in 24 days working 6 hours a day. In how many days, can 18 men produce 1800 units working 8 hours a day?
a] 36 days b] 45 days c] 18 days d] None of these
a] 36 days b] 45 days c] 18 days d] None of these
7. In a factory, machines A and B produce 8000 clips in 4 and 6 hours respectively. If they work alternatively for 1 hour, A starting first, then 8000 clips will be produced in
a] 4
hours b] 4 
hours c] 5 
hours d] 5 
hours
a] 4
hours b] 4 hours c] 5 hours d] 5 hours8. 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 in what time could B alone do it?
a] 25 days b] 50 days c] 30 days d] 40 days
a] 25 days b] 50 days c] 30 days d] 40 days
9. Bina can do a piece of work in 20 days. Sita is 25% more efficient than Bina. The number of days taken by Sita to do the same piece of work is
a] 25 b] 18 c] 16 d] 15
a] 25 b] 18 c] 16 d] 15
10. If 6 men can do a piece of work in 20 days and one man can do the work of two boys, then in how many days can 10 men and 5 boys do the same work?
a] 8 days b] 10 days c] 12 days d] None of these
a] 8 days b] 10 days c] 12 days d] None of these
11. X can do a piece of work in 40 days. He works at it for 8 days and the Y finished it in 16 days. How long will they together take to complete the work?
a] 20 days b] 15 days c] 56 days d]
days
a] 20 days b] 15 days c] 56 days d]
days12. Ajay and Vijay can together paint their house in 30 days. After working for 20 days, Ajay has to go out and Viajy finishes the remaining work in the next 30 days. If Vijay had gone away after 20 days would have completed the remaining work in
a] 15 days b] 20 days c] 25 days d] 35 days
a] 15 days b] 20 days c] 25 days d] 35 days
13. 30 men can produce 1500 units in 24 days working 6 hours a day. In how many days can 18 men produce 1800 units working 8 hours a day?
a] 36 days b] 45 days c] 18 days d] None of these
a] 36 days b] 45 days c] 18 days d] None of these
14. Terry is twice as good workman as Sumit. Terry finished a piece of work in 3 hours less than Sumit. In how many hours could they have finished that piece of work working together?
a] 2
hr. b] 4 hr. c] 2 hr. d] 6 hr.
a] 2
hr. b] 4 hr. c] 2 hr. d] 6 hr.15. A can do a work in 9 days. If B is 50% more efficient to A, then in how many days can B do the same work?
a] 13.5 b] 4.5 c] 6 d] 3
a] 13.5 b] 4.5 c] 6 d] 3
16. Some persons can do a piece of work in 12 days. Two times the number of such persons will do half of that work in.
a] 6 days b] 4 days c] 12 days d] 3 days
a] 6 days b] 4 days c] 12 days d] 3 days
17. If 50 men can do a piece of work in 12 days. Working 8 hours a day, how many hours a day would 60 men have to work, in order to do another piece of work twiceas great in 16 days?
a] 10 hours b] 9 hours c] 8 hours d] 9
hours
a] 10 hours b] 9 hours c] 8 hours d] 9
hours18. A can do a piece of work in 10 days, while B can do the same in 30 days and C in 60 days. If A is assisted by B and C respectively on alternate days, then find the number of days in which the work will be finished.
a] 2 days b] 4 days c] 8 days d] 6 days
a] 2 days b] 4 days c] 8 days d] 6 days
19. If 10 men, 8 women and 6 boys can complete a piece of work in 25 days, for how many days will 19 men, 20 women asnd 30 boys be occupied in a work three times as big if the amount of work of a man, a woman and a boy are 5 : 3 : 2.
a] 28 days b] 30 days c] 32 days d] 35 days
a] 28 days b] 30 days c] 32 days d] 35 days
20. A customer asks for the porduction of x number of goods. The company produces number of goods daily out of which z% are unfit for sale. The order will be completed in:
a]
days b] 
days c] 
days d] 
days
a]
days b] days c] days d] days21. If A and B work together, they can finish a certain job in three days. B and C together can finish the same job in six days whereas, A and C together can finish the sam job in eight days. If three of them work on the job together, how many days will they take to finish that job?
a] More than three days b] Less than three days
c] More than four days d] None of these
a] More than three days b] Less than three days
c] More than four days d] None of these
22. Dinesh and Ramesh can indepedently complete a piece of work in 80 and 120 minutes respectively. If they work together, how much time will they take to complete the work?
a] 24 minutes b] 100 minutes c] 48 minutes d] 200 minutes
a] 24 minutes b] 100 minutes c] 48 minutes d] 200 minutes
23. 3 men and 4 women can earn Rs.3780 in 7 days. 11 men and 13 women can earn Rs.15040 in 8 days. In what time, will 7 men and 9 women earn Rs.12400?
a] 15 days b] 10 days c] 20 days d] 18 days
a] 15 days b] 10 days c] 20 days d] 18 days
24. ‘A’ and ‘B’ together can complete a work in 12 days. ‘A’ alone can complete it in 20 days. If ‘B’ now does the work only for half a day daily, then in how many days ‘A’ and ‘B’ together will complete the work?
a] 15 days b] 11 days c] 20 days d] 10 days
a] 15 days b] 11 days c] 20 days d] 10 days
25. 64 persons can dig a trench 50m long, 2m wide and 2m deep in 5 days, working 12 hours daily. In how many days, working 8 hours daily, will 80 persons dig another trench 75m long, 4m wide and 3m deep?
a] 20 days b] 22 days c] 27 days d] 30 days
a] 20 days b] 22 days c] 27 days d] 30 days
Answers:
1. d 2. b 3. d 4. b 5. b 6. a 7. b 8. a 9. c 10. d 11. d 12. a 13. d 14. c 15. c 16. d 17. a 18. c 19. b 20. d 21. d 22. c 23. b 24. a 25. c
