Answers

2015-10-18T21:25:22+05:30
Time in u.s = 9hrs
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)

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