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

Total Questions: 50

11. Amit alone can complete a piece of work in 15 days and Balbir alone can do the same work in 10 days. If Amit alone works for 3 days after which Balbir joins him, then the work will be finished in how many days ? [RRB NTPC 07/01/2021 (Evening) ]

Correct Answer: (d)
Solution:

12. Rajni does 25% less work than Mohan and Mohan does 20% more work than Rizwan. At the end of the completion of the work, what will be Mohan’s share out of the profit of Rs.930? [RRB NTPC 08/01/2021 (Morning)]

Correct Answer: (b) Rs.360
Solution:

13. Twelve men can complete a task in 16 days. 32 women can complete the same task in 12 days. 8 men and 8 women worked together for 12 days, after which the women dropped and 8 men joined. In how many days will the men be able to complete the remaining task? [RRB NTPC 09/01/2021 (Morning)]

Correct Answer: (a) 3 days
Solution:

14. Sixteen men can complete work in 24 days. Twenty four women can complete the same work in 32 days. Sixteen men and sixteen women together worked for twelve days after which women dropped. How many more men are to be taken to complete the remaining work in 2 days ? [RRB NTPC 09/01/2021 (Evening) ]

Correct Answer: (a) 32
Solution:

15. Sushil can complete a piece of work in 15 h and Bishan can complete the same work in 18 h. If they work together, How much time will they take to complete the work ? [RRB NTPC 10/01/2021 (Morning) ]

Correct Answer: (c)
Solution:

16. Rajesh can finish the task in 4 days while Mahesh can finish the same task in 3 days. If both of them finish the task together and get paid Rs.350 in total, then find the share of Rajesh. [RRB NTPC 11/01/2021 (Morning)]

Correct Answer: (b) Rs.150
Solution:

17. 16 men can complete a work in 12 days. 12 women can complete the same work in 32 days. 16 men and 16 women worked together for 4 days, after which the women dropped out and 16 more men joined. In how many days will the men be able to complete the remaining work? [RRB NTPC 11/01/2021 (Evening)]

Correct Answer: (b) 3 days
Solution:

18. A can complete 25% of a task in 10 days. B can complete 40% of the task in 40 days and C can complete 1/3 of the task in 13 days. Who among them has the fastest speed to complete the task? [RRB NTPC 12/01/2021 (Morning)]

Correct Answer: (b) C
Solution:

19. A man completes a work in 15 days by working 4 hours per day for the first 5 days, 5 hours per day for the next 5 days, and 6 hours per day for the last 5 days. If he works 8 hours per day with half an hour lunch break, he will complete the work in: [RRB NTPC 13/01/2021 (Morning)]

Correct Answer: (a) 10 days
Solution:

20. A boy does 1/4th of the work done by a man in the same time. 15 men complete a particular work in 17 days. If 3 men are replaced by 3 boys, the work will be completed in : [RRB NTPC 13/01/2021 (Morning) ]

Correct Answer: (b) 20 days
Solution: