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# anil can row 18 kmph in still water and he finds that it takes him twice as long to row up as to row down the river. find the rate of the stream.

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### Mohammed

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## A man can row 18 kmph in still water. it takes him thrice as long

A man can row 18 kmph in still water. it takes him thrice as long to row up as to row down the river.find the rate of stream.

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## Let man’s rate upstream be x kmph. then his rate downstream =3x kmph. So 2x=18 or x=9. Rate upstream=9 km/hr rate downstream=27 km/hr. Hence rate of stream=1/227-9km/hr=9 km/hr.

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## A man can row 18 kmph in still water. It takes him thrice as long to row up as to row down the river. What is the rate of stream?

Answer (1 of 9): If the time taken upstream is three times the time taken downstream, then the speed downstream is three times the speed upstream Let speed of stream be y kmph (18 +y) = 3 ( 18-y) 18+y = 54 -3y 4y = 36 y = 9 kmph ANSWER

A man can row 18 kmph in still water. It takes him thrice as long to row up as to row down the river. What is the rate of stream?

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Sort Ranjan Karnad

Former Retired Banker (1972–2000)Author has 5.8K answers and 2.6M answer views2y

If the time taken upstream is three times the time taken downstream, then the speed downstream is three times the speed upstream

Let speed of stream be y kmph

(18 +y) = 3 ( 18-y) 18+y = 54 -3y 4y = 36 y = 9 kmph ANSWER Related questions

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Amit Arora

MCA from Indira Gandhi National Open University (IGNOU) (Graduated 2011)Author has 466 answers and 271.8K answer views2y

Let speed of stream = x

So downstreams speed = 18+x

And upstream speed = 18-x

It takes thrice the speed as long as to row up as to row down

So 3(18-x) =(18+x) 54-18 =4x x =36/4 x=9 km/h

So speed of stream is 9 km/h.

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Deepthi T 2y

Given , man's rate in still water = 18 kmph

Let, a= x; b= 3x (a is down stream ,b is upstream)

Rate of steam = 1/a-b kmph

= 1/x-3x =1/-2x =2x

Man's rate in still water = 1/a+b kmph

18= 1/a+b a + b = 1/18 x +3x =1/18 4x = 1/18 2x = 9

Therefore , rate of stream is 9 kmph

Sunil Gangwani

Lives in Jaipur, Rajasthan, India2y

Let the speed of the stream be v km/hr

Speed of rowing downstream = (18 + v) km/hr

Speed of rowing upstream = (18 — v) km/hr

Since it takes him thrice as long to row up as to row down the river,

Speed of rowing downstream = speed of rowing upstream

18 + v = 3(18 — v) 18 + v = 54 — 3v V = 9

Speed of river = 9 km/hr

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A man can row 9 (1/3) kmph in still water and finds that it takes him thrice as much time to row up than as to row down the same distance in the river. What is the speed of the current?

Ved Prakash Sharma

Former Lecturer at Sbm Inter College, Rishikesh (1971–2007)Author has 12K answers and 11.5M answer views2y

Let the rate of stream = x km/hr. , speed upstream = (18-x)km/hr, and downstream

= (18+x) km/hr.

Time taken in rowing d kms. upstream = d/(18-x).

Time taken in rowing d kms. downstream = d/(18+x). , accordingly :-

{ d/(18-x) }. = 3 × { d/(18+x)}.

or, 18+x = 54 - 3.x

or, 4x = 36. => x = 36/4 = 9 km/hr. Answer.

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Sushil Parwani

Former DirectorAuthor has 1.3K answers and 316.2K answer views2y

Let D be distance, t the time to row downstream and 3t the time to row upstream. Let x be the speed of stream.

3D/(18-x)=D/(18+x) 54–3x=18+x 4x=36 x=9 kmph

Rate of flow of stream is 9 kmph

Rabindra Fozdar

3 M.S. , 1 India, 2 USA. from Temple University, USA (Graduated 1979)Author has 1.1K answers and 487.9K answer views2y

Rate of flow of stream = 9 km/hr.

Method: EVEN THOUGH THERE SRE TWO UNKNOWN QUANTITIES HERE, (1) The distance travelled one way or the total time taken by the tower for crossing one way, and (2) the rate of flow of downstream; we need to assume only the second unknown as X km/hr flow rate, and we shall arrive at answer, WITHOUT HAVING TO WORRY ABOUT THE DISTANCE TRAVELLED OR TIME TAKEN ESCH WAY.

WITH X KM/HR FLOW RATE OF STREAM, the effective rate of rower UPSTREAM would be reduced by X km/hr, rresulting in net speed of (18-X ) km/hr. Going back DOWNSTREAM, the rowing rate would be increased by

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## A man can row 18 kmph in still water It takes him thrice as long as row up as to

TCS Numerical Ability Question Solution - A man can row 18 kmph in still water. It takes him thrice as long as row up as to row down the river. Find the rate of stream?

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### A man can row 18 kmph in still water. It takes him thrice as long as row up as to row down the river. Find the rate of stream?

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avanthi (11 years ago)

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