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Most popular questions of Boats and Streams

Aptitude - Boats and Streams

1.In one hour, a boat goes 11 kmph along the stream and 5 kmph against the stream. The speed of the boat in still water (in kmph) is :
A. 3 kmph

B. 5 kmph

C. 8 kmph

D. 9 kmph

2.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 ?
A. 2.4 km

B. 2.5 km

C. 3 km

D. 3.6 km

3.A man's speed with the current is 15 kmph and the speed of the current is 2.5 kmph. The man's speed against the current is :
A. 8.5 kmph

B. 9 kmph

C. 10 kmph

D. 12.5 kmph

4.A boat covers a certain distance downstream in 1 hour, while it comes back in 1.5 hour. If the speed of the stream be 3 kmph, what is the speed of the boat in still water ?
A. 12 kmph

B. 13 kmph

C. 14 kmph

D. 15 kmph

5.In a stream running at 2 kmph, a motor boat goes 10 km upstream and back again to the starting point in 55 minutes. Find the speed of the motor boat in still water.
A. 22 kmph

B. 24 kmph

C. 20 kmph

D. 23 kmph

6.A boat is rowed downstream at 15.5 kmph and upstream at 8.5 kmph. The speed of the stream is :
A. 3.5 kmph

B. 5.75 kmph

C. 6.5 kmph

D. 7 kmph

7.A man can row at 5 kmph in still water. If the river is running at 1 kmph, it takes him 75 minutes to row to a place and back. How far is the palce ?
A. 2.5 km

B. 3 km

C. 4 km

D. 5 km

8.A boatman goes 2 km against the current of stream in 1 hour and goes 1 km along the current in 10 minutes. How long will he take to go 5 km in stationary water ?
A. 40 minutes

B. 1 hour

C. 1 hr 15 min

D. 1 hr 30 min

9.A boat takes half time in moving a certain distance downstream than upstream. What is the ratio between rate in still water and rate of current ?
A. 1 : 2

B. 3 : 1

C. 2 : 1

D. 1 : 3

10.A boat goes 24 km upstream and 28 km downstream in 6 hours. It goes 30 km upstream and 21 km downstream in 6 hr and 30 min. The speed of the boat in still water is :
A. 4 kmph

B. 6 kmph

C. 10 kmph

D. 14 kmph

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