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

Total Questions: 50

1. A daily wage labourer was engaged for a certain number of days for Rs. 5850, but being absent on some of those days he was paid only Rs. 5200. What was his maximum possible daily wage? [RRB NTPC 04/02/2021 (Evening) ]

Correct Answer: (b) Rs. 650
Solution:

2. Rakesh donates blood twice in 3 years, each time 330 ml. How many litres of blood will he donate in 6 years ? [RRB NTPC 04/02/2021 (Evening) ]

Correct Answer: (a) 1.32 L
Solution:

In 3 years rakesh donate blood twice so in 6 years he will donate 4 times
Total blood donated = 4 × 330
= 1320 ml = 1.32 liter

3. Vicky can complete a piece of work in 40 days. He worked for 8 days, then Gurpreet Singh finished it in 32 days. In how many days can Vicky and Gurpreet Singh together complete the work? [RRB NTPC 08/02/2021 (Morning) ]

Correct Answer: (b) 20 days
Solution:

4. A alone can complete a work in 12 days and B alone can complete the same work in 18 days. They started working together, but A left after 3 days. In how many days will B alone be able to complete the remaining work ? [RRB NTPC 08/02/2021 (Evening) ]

Correct Answer: (c) 10.5
Solution:

5. A tyre has two punctures. The first puncture alone would have made the tyre flat in 9 min and the second alone would have done it in 6 min. If air leaks out at a constant rate, how long will it take both the punctures together to make the tyre flat ? [RRB NTPC 09/02/2021 (Morning) ]

Correct Answer: (c)
Solution:

6. A is 50% as efficient as B. C completes half of the task completed by A and B together in a day. If C alone completes the task in 40 days, then A , B and C together can complete the task in : [RRB NTPC 09/02/2021 (Morning) ]

Correct Answer: (a)
Solution:

7. There are 100 students in a hostel. Food provisions for them will last for 20 days. How long will the same food last if 25 more students join the hostel ? [RRB NTPC 11/02/2021 (Morning) ]

Correct Answer: (b) 16 days
Solution:

8. A man types at the rate of 35 words per minute. How long will it take for him to type 987 words? [RRB NTPC 11/02/2021 (Evening)]

Correct Answer: (b) 28 mins 12 secs
Solution:

9. A can lay railway track between two given stations in 16 days and B can do the same job in 12 days. With the help of C, they did the job in 4 days. Considering this, in how many days can C alone do the work? [RRB NTPC 11/02/2021 (Evening)]

Correct Answer: (d) 48/5 days
Solution:

10. A alone can complete a piece of work in 15 days, while B alone can do it in 30 days. If both of them work on alternate days, when will the work get completed? [RRB NTPC 11/02/2021 (Evening)]

Correct Answer: (c) 20 days
Solution: