# A man takes twice as long to row a distance against the stream as to row the same distance in favour of the stream.

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A man takes twice as long to row a distance against the stream as to row the same distance in favour of the stream. The ratio of the speed of the boat (in still water) and the stream is:

a) 2:1

b) 3:1

c) 3:2

d) 4:3

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Correct option: b) 3:1

Explanation:

Let the man’s rate upstream be x kmph. Then his rate downstream= 2x kmph therefore (speed in still water):(speed of stream)= ((2x+x)/2):((2x-2)/2) =3x/2 : x/2 ==3:1