Question

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 

Answer 1

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