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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

Correct Answer:

A) 1 km/hr, 5 km/hr

Description for Correct answer:
\( \Large v_{1} \) + \( \Large v_{2} \) = 6 ....(i)

\( \Large v_{1} \) - \( \Large v_{2} \) = 4 ...(ii)

From equations (i) and (ii), we get

\( \Large v_{1} = 5 km/hr \) and = \( \Large v_{2} = 1 km/hr \)

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

Comments

Similar Questions

1). 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

2). 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

3). 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

4). A motorboat takes 2 hours to travel a distance of 9 km down the current and it takes 6 hours to travel the same distance against the current. What is the speed of the boat in still water in kmph?

A). 3

B). 2

C). 1.5

D). 1

5). When the speed of a boat in still water is 4 km/h and the rate of stream is 2 km/h, find upstream speed of the boat.

A). 6 km/h

B). 5 km/h

C). 2 km/h

D). 7 km/h

6). If the speed of a swimmer in still water is 9 km/h. Find the downstream speed of the swimmer, when the river is flowing with the speed of 6 km/h.

A). 15 km/h

B). 18 km/h

C). 3 km/h

D). 12 km/h

7). Ravi can row downstream at 9 km/h and upstream at 5 km/h. Find the speed of Ravi in still water and speed of current.

A). 7 km/h and 2 km/h

B). 8 km/h and 6 km/h

C). 7 km/h and 3 km/h

D). 8 km/h and 2 km/h

8). A swimmer's speed downstream is 11 km/h and speed of the stream is 1.5 km/h. Find the upstream speed of swimmer.

A). 8 km/h

B). 9.5 km/h

C). 9 km/h

D). 6.25 km/h

9). A boatman rows 1 km in 5 min along the stream and 6 km in 1 h against the stream. The Speed of the stream is

A). 3 km/h

B). 6 km/h

C). 10 km/h

D). 12 km/h

10). Keshav can row 60 km downstream and 36 km upstream, taking 10 h each time. What is the velocity of the current?

A). 3 km/h

B). 2.2 km/h

C). 4 km/h

D). 1.2 km/h