A boat running upstream takes 8 hours 48 minutes to cover a certain distance, while it takes 4 hours to cover the same distance running downstream. What is the ratio between the speed of the boat and speed of the water current respectively?
2 : 1
3 : 2
8 : 3
Cannot be determined
None of these

• u-v=x/8.8.....(1)
  u+v=x/4.......(22)
  calculating both equation,
  u=2x/11
  v=3x/44
  u/v=8/3
• 9 years agoHelpfull: Yes(12) No(4)
• Then, distance covered upstream in 8 hrs 48 min = Distance covered downstream in 4 hrs.
  8 hrs and 48 minutes = 528 minutes
  4 hrs = 240 minutes
  then, 528/240 = 11/5 minutes
  
  we know that speed are different in down stream and upstream.
  
  if both are in opposite direction then 11+5/2 =8
  ------------------- same direction then 11-5/2 =3 ( here 2 is to take average )
  therefore ratio is 8:3
  
• 9 years agoHelpfull: Yes(8) No(2)
• Nine of these
  
  If B is speed of boat
  and
  s is speed of stream and x is distance travelled
  
  B-S = x/(8+(48/60))
  B+S = x/4
  
  solving these, we get
  
  B/S = 181/171
  
  so none of these
• 12 years agoHelpfull: Yes(2) No(25)
• Speed=distance/time
  therefore distance=speed*time.
  let consider speed at upstream is "x" and at downstream is "y", then distance covered (upstream in 8 hrs 48 min)= x*8*4/5
  
  here 8hours and 48minutes=8*48/60=8*4/5
  
  and distance covererd (downstream in 4hours=y*4
  
  to relate both these equation
  from question ,we know that distance covered are same
  
  therefore x*8*4/5 = y*4
  
  y=11/(5*x)
  we know that speed are different in down stream and upstream.
  if both are in same direction
  take difference(x-y)
  if they are in opposite
  take sum(x+y)
  
  Required ratio =(x+y)/2 : (x-y)/2 // here 2 is to take average.
  
  then answer is 8:3
• 9 years agoHelpfull: Yes(2) No(3)
• from R.S agarwal we can get the answer 8:3
• 6 years agoHelpfull: Yes(2) No(1)