Time and Work, Pipes and Cisterns Online Practice Tests

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Friends, here are some practice problems on Time and Work, Pipe and Cisterns for upcoming competitive exams. Try to solve these on your own and check with the answers given below. You will get detailed solutions with explanations soon. 

Time and Work Practice Problems :

1. Two persons Kamal and Vimal together can complete a piece of work in 9 days. Vimal alone can do that work in 36 days. In how many days can Kamal alone can complete that work ?
1. 16 days
2. 18 days
3. 12 days
4. 24 days
5. None of these
2. A and B can do a work in 20 days and 12 days respectively. The worked together on it for some time. C joins and finishes in 2 days. If C can do the total work in 10 days, how long did A and B together work ?

1. 6 days
2. 8 days
3. 10 days
4. 5 days
5. None of these
3. Rajesh is thrice as good workman as Manish and therefore able to finish a work 12 days less than Manish to finish a piece of work. In how many days they can complete if they work together ?
1. 8 days
2. 4 days
3. 16 days
4. 4(1/2) days
5. None of these
4. A, B and C can do a piece of work in 30 days, 24 days and 40 days respectively. They started working together but C left four days before the completion of the work. In how many days was the work finished ?
1. 5 days
2. 11 days
3. 12 days
4. 8 days
5. None of these
5. 72 men can complete a piece of work in 48 days. In how many days can 54 men finish the same work ?
1. 46 days
2. 68 days
3. 32 days
4. 64 days
5. None of these
6. A can finish the work in 5 days and B in 6 days. In what time they can complete it working alternatively starting with A ?
1. 5(3/5)
2. 5(2/5)
3. 5(1/2)
4. 5(1/3)
5. None of these
7. If 2 men and 3 boys can do a piece of work in 8 days and 3 men and 2 boys can do it in 7 days. In how many days will 5 men and 4 boys take to complete it ?
1. 4 days
2. 6 days
3. 7 days
4. 3 days
5. None of these
8. A contractor agrees to do a work in 36 days and employs 16 men. After 20 days he finds that only 40% of the work is finished. In order to complete the work in the stipulated time how many more men he has to recruit ?
1. 30
2. 16
3. 14
4. 12
5. None of these
9. A and B can do a piece of work in 12 days, B and C in 15 days and A and C in 20 days. In what time can A , B and C together can complete it ?
1. 5 days
2. 12 days
3. 20 days
4. 4 days
5. None of these
10. In a garrison provision is sufficient for 1200 soldiers for 30 days. But after 12 days 400 more soldiers joined the garrison. Find for how many days provision last for them ?
1. 15 days
2. 13.5 days
3. 12 days
4. 14 days
5. None of these
11. Ramu can do a certain job in 12 days. Raju is 60% more efficient than Ramu. In how many days can Raju do the same piece of work ?
1. 15 days
2. 19(1/5) days
3. 7(1/2) days
4. 8 days
5. None of these
12. 15 men would finish a piece of work in 60 days. If at the end of every 10 days, 5 additional men are employed, in how many days will it be finished ?
1. 40
2. 15
3. 30
4. 50
5. None of these
13. A man and a boy working together can do a certain amount of work in 30 days and are paid Rs. 1440. If the efficiency ratio of the man and the boy is 9:7, find the daily wages of the boy ?
1. Rs. 24
2. Rs.28
3. Rs.35
4. Rs.21
5. None of these

Pipes and Cisterns Practice Problems

1. A pipe can fill a tank in 16 min and leak can empty the full tank in 24 minutes. If both are open simultaneously, in what time can the tank be filled ?
1. 8 min
2. 28 min
3. 32 min
4. 48 min
5. None of these
2. Two pipes A and B fill a tank in 12 and 18 minutes respectively. Both pipes being opened, find when the first pipe must be turned off so that the cistern may be filled in 12 minutes ?
1. 6 min
2. 15 min
   
3. 9 min
4. 10 min
5. None of these
3. A tank can be filled by two taps in 6 hours and 9 hours respectively. The first tap was opened at 8 AM., and the second at 9 AM. At what time will the tank be filled ?
1. 11 AM
2. 1 PM
3. 12 AM
4. 2 PM
5. None of these
4. Two pipes A and B can fill a tank in 5 hours and 20 hours respectively. If both the pipes opened, due to a leakage it takes 30 minutes more to fill the tank. If the tank is full, how long will it take for the leakage alone to empty the tank ?
1. 4.5 hours
2. 9 hours
3. 36 hours
4. 24 hours
5. None of these
5. Three pipes A, B and C can fill a tank in 6 hours. After working 2 hours, C is closed and A and B fill it in another 7 hours. In how many hours will C along can fill the tank ?
1. 9 hours
2. 14 hours
3. 16 hours
4. 8 hours
5. None of these
6. A tank is filled by a tap in 3.5 hours. Due to a leak in the bottom of the tank , it takes half an hour longer to fill the tank. If the tank is full how long will it take the leak to empty it ?
1. 7.5 hours
2. 28 hours
3. 32 hours
4. 34 hours
5. None of these
7. Two pipes A and B can fill a cistern in 20 minutes and 30 minutes respectively. A drain pipe C can  remove 40 liters of water per minute. If all the three pipes are opened, it takes one hours to fill the cistern. What is the capacity of the cistern ?
1. 900 liters
2. 750 liters
3. 500 liters
4. 600 liters
5. None of these

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