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In the above question, the speed at which the stream is flowing is

A) 10 km/hr
B) 20 km/hr
C) 15 km/hr
D) 5 km/hr

Correct Answer:




D) 5 km/hr

Description for Correct answer:
From the above two equation, we get

\( \Large v_{2} \) = 5 km/hr

Part of solved Boat and Stream questions and answers : >> Aptitude >> Boat and Stream

Comments

Similar Questions

1). A boat travels 10 km in 1 hr downstream and 14 kms in 2 hrs upstream. How much time this boat will take to travel 17 kms in still water?

A). 1 hr

B). \( \Large 2\frac{1}{2} \) hrs

C). 2 hrs

D). \( \Large 3\frac{1}{2} \) hrs

2). A man goes by motor boat a certain distance upstream at 15 km/hr and return the same downstream at 20 kin/hr. The total time taken for the journey was 7 hrs. Find how far did he go.

A). 60 km

B). 50 km

C). 40 km

D). 120 km

3). A man can row upstream a distance of \( \Large \frac{2}{3} \) km in 10 minutes and returns the same distance downstream in 5 minutes. Ratio of man's speed in still water and that of the stream will be

A). 3 : 1

B). 1 : 3

C). 2 : 3

D). 3 : 2

4). A man can row a certain distance down stream in 6 hours and return the same distance in 9 hours. If stream flows at the rate of 2 km/hr, then what will be man's speed if he rows in still water?

A). 10 km/hr

B). 12 km/hr

C). 14 km/hr

D). 15 km/hr

5). A boat against the current of water goes 9 km/hr and in the direction of the current 12 km/hr. The boat takes 4 hours and 12 minutes to move upwared and downward direction from A to B. What is the distance between A and B?

A). 21.6 km

B). 21.0 km

C). 22 km

D). 30 km

6). A man takes 3 hours and 45 minutes to boat 15 km with the current in a river and 2 hours 30 minutes to cover a distance of 5 km against the current. Speed of the boat in still water and speed of the current respectively will be

A). 3 km/hr, 1 km/hr

B). 1 km/hr, 3 km/hr

C). 2 km/hr, 4 km/hr

D). none of these

7). A boat can be rowed 6 km/hr along the current and 4 km/hr against the current. Speed of the current and speed of the boat in still water, respectively will be

A). 1 km/hr, 5 km/hr

B). 5 km/hr, 1 km/hr

C). 2 km/hr, 4 km/hr

D). none of these

8). A boat moves down the stream at the rate of 1 km in 6 minutes and up the stream at the rate of 1 km in 10 minutes. The speed of the current is

A). 2 km/hr

B). 1 km/hr

C). 1.5 km/hr

D). 2.5 km/hr

9). A man can row 5 km per hour in still water. If the river is flowing at 1km per hour, it takes him 75 minutes to row to a place and back. How far is the place?

A). 3 km

B). 2.5 km

C). 4 km

D). none of these

10). Speed of a boat in still water is 7 km/hr and speed of the stream is 1.5 km/hr . How much time will it take to move up is stream of a distance 7.7 km?

A). 75 minutes

B). 84 minutes

C). 72 minutes

D). none of these