In one hour, a boat goes 11 km/hr along the stream and 5 km/hr against the stream. The speed of the boat in still water (in km/hr) is:
3 km/hr
5 km/hr
8 km/hr
9 km/hr

• 8 km/hr
  
  If B is speed of boat
  and
  s is speed of stream
  
  B+S = 11
  B-S=5
  
  then B=8 km/hr and S =3 km/hr
• 13 years agoHelpfull: Yes(3) No(0)
• speed of the boat =x
  speed of the stream =y
  speed of the downstream = x+y = 11km/hr
  speed of the upstream = x-y = 5km/hr
  x+y=11
  x-y=5
  2x=16km/hr
  x =8km/hr
• 5 years agoHelpfull: Yes(0) No(0)