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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

Correct Answer:



C) 2 km/h

Description for Correct answer:
Given,

Boat's speed in still water x = 4 km/h

Rate of stream y = 2 km/h

Therefore, Upstream speed of boat

= x - y = 4 - 2 = 2 km/h

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

Comments

Similar Questions

1). 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

2). 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

3). 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

4). 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

5). 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

6). What time will be taken by a boat to cover a distance of 128 km along the stream, if speed of a boat in still water is 24 km/h and speed of stream is 8 km/h?

A). 8 hrs

B). 4 hrs

C). 7 hrs

D). 6 hrs

7). A motorboat can travel at 10 km/h in still water. It travelled 91km downstream in a river and then returned to the same place, taking altogether 20 h. The rate of flow of river is

A). 3 km/h

B). 4 km/h

C). 2 km/h

D). 5 km/h

8). A man can row against the current three-fourth of a kilometre in 15 min and returns same distance in 10 min, then ratio of his speed to that of current is

A). 3 : 5

B). 5 : 3

C). 1 : 5

D). 5 : 1

9). The speed of the current is 5 km/h. A motorboat goes 10 km upstream and back again to the starting point in 50 min. The speed, (in km/h) of the motorboat in still water is

A). 20 km/h

B). 26 km/h

C). 25 km/h

D). 28 km/h

10). A man can row 6 km/h in still water. If the speed of the current is 2 km/h, it takes 3 h more in upstream than in the downstream for the same distance. The distance is

A). 30 km

B). 24 km

C). 20 km

D). 32km