A boatman takes twice as long to go a distance upstream as to travel the same distance downstream . What is the ratio of the speed of the boatman (in still water) and the current?

A boatman takes twice as long to go a distance upstream as to travel the same distance downstream . What is the ratio of the speed of the boatman (in still water) and the current? Correct Answer 3 : 1

Let, Boatman = x Current = y ATQ, 2dx + y = dx - y⇒x + y  = 2(x - y)⇒x + y  =  2x - 2y⇒ 2x - x = 2y  + y⇒x  = 3y ⇒xy = 3.'. x : y  =  3 : 1The ratio of thespeed of the boatman and the current  =  3 : 1 
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