A boat goes 50 Km upstream in 10 hours and a distance of 40 Km. Down stream is 9 hours. The speed of the boat in standing water is.

• Upstream:
  Distance = 50km, Time=10hrs
  Speed=5kmph (i.e.) Either U-V or 'b'
  
  Downstream:
  Dist:40km, Time=9hrs
  Speed=40/9kmph (i.e.) Either U+V or 'a'
  
  Finding:
  Speed in still water = 1/2(a+b)
  =1/2(85/9)
  =85/18
  speed in still water = 4.72kmph
• 11 years agoHelpfull: Yes(8) No(1)
• is it possible : upstream speed is greater than downstream speed!!?
• 9 years agoHelpfull: Yes(2) No(0)