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

Total Questions: 50

31. Girl can complete a piece of work in 6 days. With the help of her friend, she can complete it in 4 days. In how many days can her friend complete the work alone? [RRB NTPC 07/03/2021 (Morning) ]

Correct Answer: (a) 12
Solution:

32. Ram can finish a piece of work in 50 days. He worked for 10 days and then stopped. Then Ravi finished the remaining work alone in 32 days. How much time will Ram and Ravi, working together, need to finish the same work? [RRB NTPC 07/03/2021 (Evening) ]

Correct Answer: (c)
Solution:

33. M completes a task in 20 days and N completes the same task in 30 days. In how many days will both of them complete the same task working together? [RRB NTPC 09/03/2021 (Morning)]

Correct Answer: (c) 12
Solution:

34. Ranga and Raju together can complete a task in 6 days. If Ranga alone can complete the same task in 18 days, then how many days will Raju take to complete the task? [RRB NTPC 09/03/2021 (Evening)]

Correct Answer: (d) 9
Solution:

35. Manvi and Darshan together can complete a project work in 40 days. They worked together for 25 days and then Darshan left. After another 24 days, Manvi completed the remaining project work. In how many days can Manvi alone complete the project? [RRB NTPC 11/03/2021 (Morning)]

Correct Answer: (d) 64
Solution:

36. 21 women can complete a task in 40 days. 30 men can complete the task in 21 days. What is the ratio of the number of days a man will take to complete the task alone to the number of days a woman will need to do that task alone? [RRB NTPC 11/03/2021 (Evening) ]

Correct Answer: (d) 4 : 3
Solution:

37. A alone can finish a task in 20 days, while B alone can finish it in 15 days. They work together for 5 days and stop, then the rest of the work is finished by C alone in 2 days. If they get paid Rs.2,400 for finishing the whole task, then find the difference between the daily wages of C and A. [RRB NTPC 11/03/2021 (Evening) ]

Correct Answer: (d) Rs. 380
Solution:

38. A, B and C can complete a piece of work in 6 , 4 and 10 days, respectively. If they are working together, then the number of days they will take to complete the same work is.. [RRB NTPC 13/03/2021 (Morning) ]

Correct Answer: (d)
Solution:

39. Rama can finish a task in 50 days. He worked for 10 days then Ravi finished the remaining task alone in 32 days. How much time will Rama and Ravi take, working together, to finish the task ? [RRB NTPC 13/03/2021 (Evening) ]

Correct Answer: (b)
Solution:

40. A and B working together can finish a task in 18 days. B and C working together can finish it in 24 days. A and C working together can finish it in 36 days. In how many days will A, B and C finish the same task, working separately ? [RRB NTPC 14/03/2021 (Evening) ]

Correct Answer: (c)
Solution: