River is running at 2 kmph. It took a man twice as long to row up asto row down the river. The rate (in km/hr) of the man in still water is:

• let speed in still water=u kph
  speed of river= v kph
  speed downstream = u+v
  speed upstream= u - v
  
  it took twice.. to go upstream ie upstream=2 * downstream
  
  u-v=2(u+v)
  where v=2kph
  
  u-2=2u+4
  u=6..
  
  ignoring the negative sign..
  
  
  
• 10 years agoHelpfull: Yes(3) No(2)
• U=2 v=?
  U+v=2(u-v)
  V=1
• 8 years agoHelpfull: Yes(0) No(0)