a man can swim 3km/hr. in still water if the velocity of the stream is 2 km/hr, the time taken by him to swim to place 10 km upstream and back is

• in upstream time taken = 10/(3+2)=2 hour
  backstream time taken = 10/(3-2)=10 hour
  total=12 hours
• 10 years agoHelpfull: Yes(3) No(0)