Time and Work (Railway Maths) (Part – V)

Total Questions: 57

11. Anil is twice as efficient as Behu and together they can complete a task in 12 days. In how many days can Anil alone complete the task ? [RRB NTPC 23/07/2021 (Morning) ]

Correct Answer: (b) 18
Solution:

12. 14 men can complete a task in 9 days and 16 women can complete the same task in 7 days. In how many days can 6 men and 8 women complete the task? [RRB NTPC 23/07/2021 (Morning) ]

Correct Answer: (b) 8.4
Solution:

13. A certain number of men can complete a task in 50 days. If there are 5 men more, then it can be finished in 10 days less. How many men are there initially? [RRB NTPC 24/07/2021 (Evening) ]

Correct Answer: (c) 20
Solution:

14. A can complete 1/3 of a work in 5 days and B can do 2/5 of the work in 10 days. In how many days can both A and B together do the work? [RRB NTPC 26/07/2021 (Evening) ]

Correct Answer: (b)
Solution:

15. Ram and Shyam can finish a work in 30 days, Shyam and Bharti can finish it in 40 days and Bharti and Ram can finish it in 60 days. How long will they three together take to finish the work ? [RRB NTPC 31/07/2021 (Morning) ]

Correct Answer: (d)
Solution:

16. 42 horses consume 270 kg of corn in 27 days. If there are 21 horses only, then how many days will 300 kg of corn last? [RRB JE 22/05/2019 (Evening)]

Correct Answer: (b) 60
Solution:

17. P alone can do a job in 18 days. P and Q working together can do it in 15 days. They started to work together. After 10 days Q left, and P alone has to complete the job. In how many more days can P complete the remaining job? [RRB JE 22/05/2019 (Evening)]

Correct Answer: (c) 6 days
Solution:

18. P and Q can complete a job in 6 and 8 days individually. They both finish the job with the help of R in 3 days. How much wages are to be paid to R, if the total wages are Rs. 3200? [RRB JE 23/05/2019 (Evening)]

Correct Answer: (c) Rs. 400
Solution:

19. Sufficient food-supply was arranged to last for 30 days for 250 soldiers. If 50 soldiers did not attend the camp, for how many extra days will the food-supply last ? [RRB JE 24/05/2019 (Morning) ]

Correct Answer: (d) 7.5 days
Solution:

20. P, Q and R can do a work In 15, 20 and 30 days respectively. The contractor decides to put any two of them on the job so as to finish the work earlier. Which of these choices is the best ? [RRB JE 24/05/2019 (Evening) ]

Correct Answer: (c) PQ
Solution: