A man goes upstream for a distance of 10 kms in 5 hours. Another man goes downstream for the same distance of 10kms in 3 houes. what is the difference of the speeds of the two men if the river speed is 0.5 Kms. (Round the answer to two decimals).)

Options:
A. 2.45
B. 1.56
C. 2.3
D. 1.33

• (10/5)=A-(1/2)
  A=5/2
  
  (10/3)=B+(1/2)
  B=17/6
  
  B-A=0.33
• 10 years agoHelpfull: Yes(28) No(6)
• speed for 1st person=2 m/s ,speed for 2nd person=3.33 m/s.for upstream=2+0.5=2.5
  for downstream=3.33+0.5=3.83.then diff=3.83-2.5=1.33
  so ans=1.33
• 10 years agoHelpfull: Yes(12) No(17)
• let velocity of first man be A & velocity of second man be B
  10/5=A-0.5 ......(1)
  10/3=B+0.5 .....(2)
  SOLVING (1)&(2)
  we get B-A=2.33
  ANS:2.33
• 10 years agoHelpfull: Yes(9) No(15)
• speed of the person going upstream=(10/5)-0.5=1.5km/hr
  " " " " " downstream=(10/3)+0.5=3.83km/hr
  so,difference is= 3.83 - 1.5 =2.33 km/hr.
  
• 10 years agoHelpfull: Yes(7) No(6)
• (10/3 + .5)-(10/5 - .5)
  =1.33
  correct ans
• 10 years agoHelpfull: Yes(4) No(1)
• ans 0.33
  not in option
  if we tick any option then will it be go in the negative marking?
  plzzz tell me
• 10 years agoHelpfull: Yes(3) No(0)
• m1-0.5=2 or m1=2.5
  m2+0.5=3.33 or m2=2.83
  |m1-m2|=0.33
  That's not in the options !!!
• 10 years agoHelpfull: Yes(2) No(0)
• (10/5)=A-(1/2)
  A=5/2
  (10/3)=B+(1/2)
  B=17/6
  B-A=0.33
• 10 years agoHelpfull: Yes(1) No(0)
• ans- 1.33
  bcoz, here the speed of both the persons u r calculating includes the upstream and downstream speeds as given in the question.. so 1st persons speed = 2km/hr (10/5) and 2nd persons speed = 3.33km/hr(10/3) .. as i have said before in the sum the speed of both the persons u have calculated is not the speed in still water so both of the speeds will be added with the stream speed i.e
  1st person =2+0.5=2.5km/hr
  2nd person=3.33+0.5=3.83km/hr
  therefore difference= 3.83-2.5=1.33 km/hr
• 9 years agoHelpfull: Yes(1) No(1)
• Ans is 2.3
  
  speed in upstream is given by 10/5=2
  
  speed in down stream is given by 10/3=3.33
  
  now speed in down stream when river speed v=0.5 is given is u+v =3.33+0.5=3.8
  
  speed in upstream is u-v= 2-0.5=1.5
  
  now diff is 3.8-1.5=2.3
• 9 years agoHelpfull: Yes(1) No(1)
• ans is 9..as 9 no of 5 is present.
  
• 10 years agoHelpfull: Yes(0) No(1)
• dist=speed*time
  10=(A-.5)*5
  10=(B+.5)*3
  A=12.5/5
  B=11.5/3
  B-A=4/3=>1.33(D)
• 9 years agoHelpfull: Yes(0) No(0)