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Ashutosh can row 24 km/h in still water. It takes him twice as long to row up as to row down the river. Find the rate of stream.

A) 4 km/h
B) 18 km/h
C) 8 km/h
D) 15 km/h

Correct Answer:



C) 8 km/h

Description for Correct answer:

Let rate of stream be a km/h.

According to the question,

24 + a = 2 (24 - a)

=> 24 + a = 48 - 2a

=> 3a = 48 - 24 = 24

a = \( \Large \frac{24}{3} \) = 8 km/h

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

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Similar Questions

1). A boat goes 12 km in 1 h in still water. It takes thrice time in covering the same distance against the current. Find the speed of the current.

A). 8 km/h

B). 12 km/h

C). 6 km/h

D). 7 km/h

2). A boatman takes twice as long to row a distance against the stream as to row the same distance with the stream. Find the ratio of speeds of the boat in still water and the stream.

A). 2 : 1

B). 3 : 1

C). 1 : 2

D). 1 : 3

3). A boat running upstream takes 528 min to cover a certain distance, while it takes 240 min to cover the same distance running downstream. What is the ratio between the speed of the boat and speed of the water current, respectively?

A). 2 : 1

B). 3 : 2

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D). Couldn't be determined

4). A river is flowing with a steady speed of 4 km/h. One rows his boat downstream in the river and then returns by rowing upstream in the same river. When he returns to the starting point, the total distance covered by him is 42 km. If the return journey takes 2 h more than his outward journey, then the speed of his rowing in still water must be

A). 12 km/h

B). 10 km/h

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5). The ratio of speeds of a motorboat to that of the current of water is 36 : 5. The motorboat goes along with the current in 5 h 10 min. Find the time to come back of motorboat.

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B). 6 h

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6). Ishwar is rowing a boat. He takes half time in moving a certain distance downstream than upstream. What is the ratio of the rate of boat in still water to the rate of current?

A). 2 : 1

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7). In a river, the ratio of the speed of stream and speed of a boat in still water is 2 : 5. Again, ratio of the speed of stream and speed of an another boat in still water is 3 : 4. What is the ratio of the speeds of the first boat to the second boat in still water?

A). 10 : 7

B). 15 : 8

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8). A motorboat travelling at the some speed, can cover 25 km upstream and 39 km downstream in 8 h. At the Same speed, it can travel 35 km upstream and 52 km downstream in 11 h. The speed of the stream is

A). 2 km/h

B). 3 km/h

C). 4 km/h

D). 5 km/h

9). A boat covers 24 km upstream and 36 km downstream in 6 h, while it covers 36 km upstream and 24 km downstream in \( 6\frac{1}{2} \) h. The speed of the current is

A). 1 km/h

B). 2 km/h

C). 1.5 km/h

D). 2.5 km/h

10). A, B and C are situated at the bank of river which is flowing at a constant rate. B is at an equal distance with A and C. A swimmer Avinash takes 10 h to swim from A to B and B to A. Also, he takes 4h to swim from A to C. What is the ratio of speed of Avinash in still water and speed of stream?

A). 5 : 3

B). 3 : 5

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