Time and Work Questions for BOB Office Assistant Exam 2025

Time and Work Questions for BOB Office Assistant Exam 2025 are a crucial part of the quantitative aptitude section that candidates must prepare thoroughly to score well. These questions test a candidate’s ability to analyze and solve problems related to work efficiency, time taken by individuals or groups to complete tasks, and their combined efforts. Understanding concepts like work done, efficiency, and the relation between time and work is essential.

Time and Work Questions for BOB Office Assistant Exam 2025

Practicing a variety of problems on these topics helps in improving calculation speed and accuracy, which is vital for clearing the competitive BOB Office Assistant Exam 2025. Mastery over Time and Work questions not only boosts confidence but also enhances problem-solving skills, making it an important area to focus on during exam preparation.

Q1. A is 1.5 times as efficient as that of B and  C takes half time as compared to that of A. If A and B takes 2 2/5  days to complete half of the work then find the time taken by A and C together to complete the whole work?

(a) 2 1/3  days

(b) 3 1/3  days

(c) 1 1/3  days

(d) 1 2/3  days

(e) 2 2/3  days

Q2. In a tank two inlet pipes A and B and one outlet pipe, C, all together can fill the tank in 5 hours, while pipe C alone can empty the whole tank in 20 hours. Find the time taken by A and B to fill the tank complete.

(a) 2 hours

(b) 3 hours

(c) 4 hours

(d) 6 hours

(e) 3.5 hours

Q3. C is 100% more efficient than B. A alone can complete a piece of work in 9 days and B & C together can complete the same work in 2 2/3  days. Find what portion of work will be completed, if A & B works together for 4 days.

(a)  13/18

(b)  8/9

(c)  5/6

(d)  2/3

(e)  17/18

Q4. A working alone and B working alone can complete same piece of work in 30 days and 18 days respectively. If B alone started the same work and A replaced B after 6 days, then find in how many days the work will be completed?

(a) 20 Days

(b) 18 Days

(c) 24 Days

(d) 26 Days

(e) 32 Days

Q5. A work can be completed by A alone in 75 days. A started the work and left after 36 days after which B completed the remaining work in 26 days. In how many days can B alone finish the work?

(a) None of these

(b) 50

(c) 48

(d) 46

(e) 52

Q6. Pipe – A & B are inlet pipes and pipe – C is an outlet pipe. Pipe – C is connected above 33 1/3% capacity of the tank. Pipe – B is 50% more efficient than pipe – A and pipe – C is 100% more efficient than pipe – A. If all the pipes are opened simultaneously, then find the time taken by all 3 pipes to fill the empty tank.

(a) 8 hours 12 minutes

(b) 7 hours 50 minutes

(c) 9 hours 30 minutes

(d) 8 hours 48 minutes

(e) 7 hours 36 minutes

Q7. Two inlet taps A and B can fill a tank in 36 minutes and 60 minutes respectively. Find the time taken by both the taps together to fill  1/6 th of the tank?

(a) 3 minutes

(b) 3 3/4  minutes

(c) 3 1/2  minutes

(d) 3 1/3  minutes

(e) 2 1/3  minutes

Q8. A alone can do a work in 12 days while A and B together can do that work in 7.5 days. Find the time taken by C alone to do that work if C takes 3 days more than that of B alone to do that work?

(a) 33 days

(b) 30 days

(c) 23 days

(d) 27 days

(e) 28 days

Q9. 12 women can complete a work in 64 day, then find how many women will be required to complete 2/3 rd of the same work in 16 days?

(a) 28

(b) 24

(c) 36

(d) 32

(e) 48

Q10.  12 men can do a work in 10 days while 10 women can do the same work in 18 days. In how many days 4 men & 6 women together can do the same work?

(a)  120/7  days

(b) 24 days

(c)  180/13  days

(d) 15 days

(e) 18 days

Q11. Two pipes A & B individually fill an empty tank in 15 hours and 45 hours respectively. A pipe C can empty the same tank in 30 hours. If all three pipes opened together in the tank, then in how many hours the tank will be filled completely?

(a) 24 hours

(b) 18 hours

(c) 16 hours

(d) 12 hours

(e) 20 hours

Q12. Pipe A & pipe B together can fill half of a tank in 7 hours, while pipe C can empty 40% of the same tank x hours. When all three pipes open together in same empty tank, then it completely filled in 26  1/4  hours. Find value of x?

(a) 18

(b) 12

(c) 16

(d) 24

(e) 9

Q13. A can do work in 24 days and B can do the same work in 18 days. If A starts work alone and after four days B joined him, then find in how many days total work will be completed?

(a) 10  4/7  days

(b) 12  4/7  days

(c) 14  4/7  days

(d) 12 3/7 days

(e) 12  2/7 days

Q14. A and B together can do  8/15  of a work in 5 days and B alone can do the remaining work in 7 days. Find in how many days A alone can do the work?

(a) 15

(b) 25

(c) 12.5

(d) 20

(e) 50

Q15. A and B together can do a piece of work in 12 days, whereas B alone took 6 days more than the time taken by A and B together. Find the time taken by A alone to complete the work?

(a) 22 days
(b) 30 days
(c) 28 days
(d) 36 days
(e) 25 days