A boat takes 19 hours for travelling downstream from point A to point B and coming back to a point C midway between A and B. If the velocity of the stream is 4 kmph and the speed of the boat in still water is 14 kmph, what is the distance between A and B ?
A. 160 km
B. 180 km
C. 200 km
D. 220 km

• Down Stream Speed :(14+4)km/hr =18 km/hr
  Up Stream Speed:(14-4)km/hr=10km/hr
  (x/18)+(x/2/20)=19
  x=180km
• 10 years agoHelpfull: Yes(1) No(0)
• Downstream= 14 + 4 =18kmph
  Upstream = 14 - 4 = 10kmph
  
  Time taken 19hrs
  Then assume the distance is X,
  X/18-X/2*10 =19
  19X/180 =19
  
  
  >>X = 180Kms
• 7 years agoHelpfull: Yes(0) No(0)
• Let the distance be D
  Given that=D/(14+4)+ D/2/(14-4)
  =D/18+D/20=19
  =(10D + 9D)/180= 19
  =19D = 19 x 180
  =D= 180 KM
• 5 years agoHelpfull: Yes(0) No(0)