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

Total Questions: 50

41. A can do a piece of work in 15 days and B can do the same work in 20 days. The time taken by them working together to do the same work is: [Group D 02/09/2022 (Morning) ]

Correct Answer: (b)
Solution:

42. Anu is four times as good as Binni in doing work. Together they finish the same work in 12 hours. In how many hrs. will Anu alone finish the work? [Group D 05/09/2022 (Morning) ]

Correct Answer: (c) 15 hrs
Solution:

43. A, B and C together can complete a certain work in 40 days. B and C together can complete the same work in 60 days. B is 25% more efficient than A. A, B and C work together for 30 days. B alone will complete the remaining work in: [Group D 05/09/2022 (Afternoon) ]

Correct Answer: (d) 24 days
Solution:

44. A and B alone can do a piece of work in 30 days and 40 days respectively. If they work together and get ₹ 2,800 for doing the work, what will be A's share? [Group D 06/09/2022 (Afternoon) ]

Correct Answer: (c) ₹1,600
Solution:

45. A can do a piece of work in 12 days, and B can do the same work in 20 days. If they work alternately, starting from B, then in how many days will the work be completed? [Group D 06/09/2022 (Afternoon) ]

Correct Answer: (a)
Solution:

46. A and B can do a work in 18 days, B and C can do the same work in 15 days, while A and C can do the work in 12 days. Working together, how much time will they take to complete the work? [Group D 06/09/2022 (Evening) ]

Correct Answer: (c)
Solution:

47. A can do a piece of work in 12 days. B can do the same work in 15 days. C can do the same work in 9 days. The time taken by them to finish the same work if they work together is: [Group D 08/09/2022 (Morning) ]

Correct Answer: (d)
Solution:

48. A can complete a piece of work in 35 days. B is 30% less efficient than A.C is 25% more efficient than B. B and C work together for 10 days. A alone will complete the remaining work in: [Group D 08/09/2022 (Afternoon) ]

Correct Answer: (d)
Solution:

49. 12 unskilled and 14 skilled workers together complete a certain piece of work in 9 days. If each unskilled worker takes twice the time taken by a skilled worker to finish the work, in how many days will 12 skilled workers finish the same work? [Group D 08/09/2022 (Evening) ]

Correct Answer: (b) 15 days
Solution:

50. A. B and C can complete a piece of work in 20, 24 and 30 days, respectively. The number of days they take to finish it if they work together will be: [Group D 09/09/2022 (Evening) ]

Correct Answer: (a) 8 days
Solution: