# A boat takes 9 hrs to travel from A to B upstream. If the river current is 3 km/hr, how long will it take to travel downstream between B and A ?

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by simonraatg

What distance in above question

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by simonraatg

What distance in above question

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speed of boat in still water = X

speed of current = 3km/hr

speed in u.s = (X-3)km/hr

s = D/T

(X-3)=D/9

D=9(X-3)

now , (X+3)=D/T

L=9(X-3) / (X+3)