A man can row kph in still water. If the river is running at kph,it takes min to go to a place and come back. How far is the place?
Let the total distance be
Speed of the man in the river
and, speed of the river
So, Upstream Speed
Downstream Speed
Time taken while going upstream is
and, Time taken while going downstream is
Since, the total time is min
Therefore,
Hence, the distance of the place is .