Boat and Stream

Total Questions: 50

21. A boat can go 54 km upstream in 6 hours. If the speed of the stream is 4.8 km/h, then how much time (in hours) will the boat take to cover a distance of 279 km downstream? [SSC CGL 11/09/2024 (3rd Shift)]

Correct Answer: (b) 15
Solution:

22. A boatman goes 2 km against the current of the stream in 1 hour and goes 1 km along with the current in 10 minutes. How long will it take to go 6 km in stationary water? [SSC CGL 12/09/2024 (3rd Shift)]

Correct Answer: (a) 1 hr 30 min
Solution:

23. A boat can travel 78 km upstream and back in a total of 32 hours. It can travel 15 km upstream and 52 km downstream in a total of 9 hours. How much distance will the boat cover in 12 hours in still water? [SSC CGL 13/09/2024 (1st Shift)]

Correct Answer: (b) 96 km
Solution:

24. A boatman rows to a place 30 km distant and back in 14 hours. He finds that he can row 10 km with the stream at the same time as 4 km against the stream. Find the speed (in km/h) of the stream. [SSC CGL 13/09/2024 (3rd Shift)]

Correct Answer: (b) 9/4
Solution:

25. A motorboat travelling at some speed can cover 24 km upstream and 40 km downstream in 17 hours. At the same speed it can travel 32 km downstream and 12 km upstream in 10 hours. The speed of the stream is: [SSC CGL 18/09/2024 (1st Shift)]

Correct Answer: (d) 3 km/h
Solution:

Let speed of boat in still water = xkm/h
Speed of stream = y km/h

26. A man can row a distance of 6 km in 1 hour in still water. He can row the same distance in 45 minutes with the current. Find the total time taken by him to row a distance of 16 km with the current and to return to the starting point. [SSC CGL 18/09/2024 (3rd Shift)]

Correct Answer: (b) 6 hours
Solution:

27. A motorboat, whose speed is 15 km/h in still water, goes 50 km downstream and comes back in a total of 7 hours 30 minutes. The speed of the stream (in km/h) is: [SSC CGL 23/09/2024 (2nd Shift)]

Correct Answer: (b) 5
Solution:

28. A boat covers a distance of 55 km downstream in 5 hours while it takes 11 hours to cover the same distance upstream. What is the speed of the boat? [SSC CGL 23/09/2024 (3rd Shift)]

Correct Answer: (a) 8 km/h
Solution:

29. A man can row 18 km/h in still water. It takes him two times as long to row up as to row down the river. Find the rate of the stream. [SSC CHSL 01/07/2024 (3rd Shift)]

Correct Answer: (d) 6 km/h
Solution:

30. A boat can travel 60km downstream in 4 hours. If the speed of the boat in still water is 13 km/h, then in what time will it cover 30 km upstream? [SSC CHSL 02/07/2024 (1st Shift)]

Correct Answer: (d) 2⁸⁄₁₁ hours
Solution: