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

Total Questions: 50

1. The capacity of working by A and B is in the ratio 3 : 4. If A takes 12 days to finish the work, the time taken by B to finish the same work is: [RRB NTPC 28/12/2020 (Evening)]

Correct Answer: (a) 9 days
Solution:

2. A, B and C can complete a job in 5 days. B, C, and D can complete the same job in 10 days. C, D, and A can complete the same job in 15 days and D, A, and B can complete the same job in 30 days. How long do A, B, C, and D together take to finish the job? [RRB NTPC 29/12/2020 (Morning)]

Correct Answer: (c)
Solution:

3. Avinash, Bhuvnesh, and Chaman can complete a piece of work in 20, 30, and 60 days respectively. In how many days can Avinash complete the work if he is assisted by Bhuvnesh and Chaman on every third day? [RRB NTPC 30/12/2020 (Morning)]

Correct Answer: (c) 15
Solution:

4. A and B can complete a job in 40 days and 60 days respectively. They work together for some days and B leaves the job. If A completes the rest of the work in 10 days, find for how many days B worked? [RRB NTPC 30/12/2020 (Evening)]

Correct Answer: (c) 18 days
Solution:

5. 15 male employees or 20 female employees of a company can complete a project in 26 days. How long will 30 male employees and 12 female employees together take to complete the project? [RRB NTPC 04/01/2021 (Morning)]

Correct Answer: (b) 10 days
Solution:

6. Harish and Bimal can complete a task in 20 days. They worked at it for 15 days and then Bimal left. The remaining work was done by Harish alone in 10 days. Harish alone can complete the entire task in: [RRB NTPC 04/01/2021 (Morning)]

Correct Answer: (a) 40 days
Solution:

7. Anil alone can complete a task in 6 days and Bhushan alone can complete it in 8 days. Anil and Bhushan undertook the task for Rs.3,200. With the help of Chaman, they completed the task in 3 days. What is Chaman’s share in this earning? [RRB NTPC 05/01/2021 (Morning)]

Correct Answer: (c) Rs.400
Solution:

8. Anil and Balbeer can finish a task in 3 days. They started working together, but after 2 days Anil got injured. Balbeer took 2 more days to finish the task. In how many days can Balbeer alone finish the same task? [RRB NTPC 05/01/2021 (Morning)]

Correct Answer: (d) 6
Solution:

9. Amar Jeet Singh can complete a piece of work in 5 days. With the help of his son he can complete it in 3 days. In how many days can the son independently complete the work ? [RRB NTPC 05/01/2021 (Evening) ]

Correct Answer: (b)
Solution:

10. 35 people could complete a work in 24 days. But after they worked together for 6 days, their employer wanted that the work should be completed in a total of 16 days. How many more workers need to be employed to meet the deadline ? [RRB NTPC 05/01/2021 (Evening) ]

Correct Answer: (b) 28
Solution: