Quantitative Apitude-Problems on Boat & Stream
Quantitative Apitude-Problems on Boat & Stream
21. A boat running upstream takes 8 hours 48 minutes to cover a certain distance, while it takes 4 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and speed of the water current respectively?
- 2 : 1
- 3 : 2
- 8 : 3
- Cannot be determined
22. A motorboat, whose speed in 15 km/hr in still water goes 30 km downstream and comes back in a total of 4 hours 30 minutes. The speed of the stream (in km/hr) is:
- 4
- 5
- 6
- 10
23. In one hour, a boat goes 11 km/hr along the stream and 5 km/hr against the stream. The speed of the boat in still water (in km/hr) is:
- 3 km/hr
- 5 km/hr
- 8 km/hr
- 9 km/hr
24. A boat running downstream covers a distance of 16 km in 2 hours while for covering the same distance upstream, it takes 4 hours. What is the speed of the boat in still water?
- 4 km/hr
- 6 km/hr
- 8 km/hr
- Data inadequate
25. The speed of a boat in still water in 15 km/hr and the rate of current is 3 km/hr. The distance travelled downstream in 12 minutes is:
- 1.2 km
- 1.8 km
- 2.4 km
- 3.6 km
26. A boat takes 90 minutes less to travel 36 miles downstream than to travel the same distance upstream. If the speed of the boat in still water is 10 mph, the speed of the stream is:
- 2 mph
- 2.5 mph
- 3 mph
- 4 mph
27. A man can row at 5 kmph in still water. If the velocity of current is 1 kmph and it takes him 1 hour to row to a place and come back, how far is the place?
- 2.4 km
- 2.5 km
- 3 km
- 3.6 km
28. A boat covers a certain distance downstream in 1 hour, while it comes back in 1 hours. If the speed of the stream be 3 kmph, what is the speed of the boat in still water?
- 12 kmph
- 13 kmph
- 14 kmph
- 15 kmph
29. A boatman goes 2 km against the current of the stream in 1 hour and goes 1 km along the current in 10 minutes. How long will it take to go 5 km in stationary water?
- 40 minutes
- 1 hour
- 1 hr 15 min
- 1 hr 30 min
30. Speed of a boat in standing water is 9 kmph and the speed of the stream is 1.5 kmph. A man rows to a place at a distance of 105 km and comes back to the starting point. The total time taken by him is:
- 16 hours
- 18 hours
- 20 hours
- 24 hours