Question

The speed of a boat in still water is 10 kmph. if it can travel 26 km downstream and 14 km upstream in the same time, the speed of the stream is

Answer 1

Assume rate of steam be x kmph

As we know time= distance/rate i.e

Given downstream = 26/(10+x) and upstream = 14/(10-x)

On solving we get

                                    =  26/(10+x) = 14/(10+x)

                                    =  130x - 13x = 70 + 7x

                                    x = 3km/hr