A man can go upstream at 8 km/h and downstream at 13 km/h. The speed of the stream is .
a) 2.5kmph
b) 4.2kmph
c) 5kmph
d) 10.5kmph

• let speed of man=x
  let speed of stream=y
  so, x-y=8
  x+y=13
  solving we get y=2.5 kmph
• 11 years agoHelpfull: Yes(16) No(0)
• downstream(a)=13km/hr,upstream(b)=8km/hr
  speed of the stream is 1/2(a-b)=1/2(13-8)=1/2(5)=2.5km/hr
• 11 years agoHelpfull: Yes(4) No(1)
• Speed of stream=1/2(13-8)
  =5/2
  =2.5
• 11 years agoHelpfull: Yes(1) No(0)
• 1/2(13-8)=2.5
  
• 11 years agoHelpfull: Yes(0) No(0)
• speed of stream=1/2(d/w stream speed- upstream speed)
  ans: =1/2(13-5)
  =1/2(5)
  =2.5 kmph
• 11 years agoHelpfull: Yes(0) No(0)
• speed of stream=(d-u)/2
  d=speeed of downstream
  u=speed of upstream
  
  (13-8)/2=2.5km/hr
• 11 years agoHelpfull: Yes(0) No(1)
• u+v=13
  u-v=8
  by solving we get v=2.5
  u is speed of boat , v is speed of stream
• 5 years agoHelpfull: Yes(0) No(0)