Aptitude  Boats and Streams  Practice Q&A

1. 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

2. 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

3. 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

4. A boat can travel with a speed of 13 km/hr in still water. If the speed of the stream is 4 km/hr, find the time taken by the boat to go 68 km downstream.

2 hours 3 hours 4 hours 5 hours

5. A man can row 7.5 kmph in still water and he finds that it takes him twice as long to row up as to row down the river. Find the rate of stream.

10 km/hr 2.5 km/hr 5 km/hr 7.5 km/hr

6. 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

7. Tap A can fill the tank completely in 6 hrs while tap B can empty it by 12 hrs. By mistake, the person forgot to close the tap B, As a result, both the taps, remained open. After 4 hrs, the person realized the mistake and immediately closed the tap B. In how much time now onwards, would the tank be full?

2 hours 4 hours 5 hours 1 hour

8. A man rows to a place 48 km distant and come back in 14 hours. He finds that he can row 4 km with the stream in the same time as 3 km against the stream. The rate of the stream is:

1 km/hr 1.5 km/hr 2 km/hr 2.5 km/hr

9. If a mans rate with the current is 15 km/hr and the rate of the current is 11/2 km/hr, then his rate against the current is

12 km/hr 10 km/hr 10.5 km/hr 12.5 km/hr

10. The speed of the boat in still water in 12 kmph. It can travel downstream through 45 kms in 3 hrs. In what time would it cover the same distance upstream?

8 hours 6 hours 4 hours 5 hours

 

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