Question

A man takes twice as long to row a distance against the stream as to row the same distance in favour of stream the ratio of speed boat and the streaam is

Answer 1

Let speed of man upstream= x kmph & his speed downstream = 2x kmph

Hence the ratio will be , (2x+x)/2 : (2x-x)/2

                                      3x/2 : x/2

                                       ⇒3:1

Answer 2

Let man's rate upstream be x kmph.

Then, his rate downstream = 2x kmph.

(Speed in still water) : (Speed of stream) = 2x + x : 2x - x

2 2

= 3x : x

2 2

= 3 : 1.