Boat and Stream (Railway Maths) (Part – I)

Total Questions: 20

1. A boat starting from point P goes downstream to point Q in 3 hours and returns back from point Q to point P in 4 hours. If the speed of the water is 3 km/h, find the speed(km/h) of the boat in still water. [Group D 22/08/2022 (Evening) ]

Correct Answer: (c) 21
Solution:

2. A boat goes 30 km upstream and 44 km downstream in a total of 10 hours. It also goes 40 km upstream and 55 km downstream in a total of 13 hours. The speed (in km/h) of the stream is: [Group D 26/09/2022 (Afternoon) ]

Correct Answer: (b) 3
Solution:

3. Find the answer of given question? [NTPC CBT II Level 2 (13/06/2022) Shift 2 ]

Correct Answer: (c) 5.6
Solution:

4. The speed of a boat in still water is 15 km/h. The speed of the current is 3 km/h. The difference between the time taken for upstream and downstream to complete two trips (i.e from one end to the other coming back and repeating the same again) is 10 minutes. What is the distance between the two ends? [NTPC CBT - I 08/01/2021 (Morning) ]

Correct Answer: (d) 3 km
Solution:

5. Speed of a boat in still water is x km/h and the speed of a stream is y km/h. If the time taken to go upstream is 't' hours more than the time taken to go downstream, find the distance covered. [RRB JE 30/05/2019 (Evening) ]

Correct Answer: (b)
Solution:

6. A boat in a still flowing river travels a certain distance downstream at a speed of 12 km/h and then covers the same distance in the opposite direction at a speed of 24 km/h. Find the average speed for the total journey. [ALP Tier II 23/01/2019 (Morning) ]

Correct Answer: (d) 16 km/h
Solution:

7. A boat takes 21 minutes to go 12.6 km upstream. The ratio of the speed of the boat in still water to that of the stream is 7:2. How much total time (in hours) will the boat take to go 43.2 km upstream and 38.88 km downstream? [Group D 02/09/2022 (Evening) ]

Correct Answer: (d) 1.8
Solution:

8. The speed of a stream is 4 km/h. A boat can go 40 km downstream and 12 km upstream in 4 hours. What is the speed (in km/h) of the boat in still water? [Group D 05/09/2022 (Afternoon) ]

Correct Answer: (b) 12
Solution:

9. A diver rowing at the speed of 3 km/h in still water takes double the time going 50 km upstream compared to going 50 km downstream. The speed (in km/h) of the stream is: [Group D 16/09/2022 (Morning) ]

Correct Answer: (b) 1
Solution:

10. A person can row at a speed of 11 km/h in still water. The speed of stream is 5/6 m/s. How much will he take to row a distance of 36 km upstream? [Level 6 (09/05/2022) Shift 2 ]

Correct Answer: (b) 4 hrs 30 min
Solution: