Boats and Streams

1.		A boatman goes 2 km upstream in 1 hour and goes 1 km downstream in 10 minutes. How long will it take to go 5 km in still water ?

40 minutes

1 hour

1 hr 15 min

1 hr 30 min

2.		A boat takes 90 minutes less to travel 24 km downstream than to travel the same distance upstream. If the speed of the boat in still water is 12 km/h, the speed of the stream is:

4 km/h

5 km/h

6 km/h

Can't be determined

3.		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

4.		A man's speed with the current is 15 km/hr and the speed of the current is 2.5 km/hr. The man's speed against the current is:

8.5 km/hr

9 km/hr

10 km/hr

12.5 km/hr

5.		A boat goes 24 km upstream and 28 km downstream in 6 hrs. If it goes 30 km upstream and 21 km downstream in 6 hrs and 30 mins, find the speed of the stream.

10 km/hr

5 km/hr

4 km/hr

6 km/hr

6.		A boat covers a certain distance downstream in 1 hour, while it comes back upstream in 1 1/2 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

7.		A man can row at 5 km/hr in still water. If the river is running at 1 km/hr, it takes him 75 min to row to a place and come back. How far is the place ?

2.5 km

3 km

4 km

5 km

8.		A motorboat whose speed is 15 km/hr in still water goes 30 km downstream and comes back in 4 hrs and 30 mins. The speed of the stream is:

10 km/hr

4 km/hr

5 km/hr

6 km/hr

9.		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

10.		A boat sails 15 km upstream in 5 hrs. How long will it take to cover the same distance downstream, if the speed of current is one-fourth the speed of the boat in still water

1.8 hrs

3 hrs

4 hrs

5 hrs