Sudhir can swim at a speed of 15/2 km/hour in still water. If he takes 4 times as long to swim a distance upstream as to swim the same distance downstream, then find the speed of stream.
1
4 km/hr
2
3 km/hr
3
3.5 km/hr
4
4.5 km/hr
5
None of these
Sudhir can swim at a speed of 15/2 km/hour in still water. If he takes 4 times as long to swim a distance upstream as to swim the same distance downstream, then find the speed of stream.