Jack and Paul covers 10 km. Jack has speed 1.5 km/h more than Paul and reaches the destination 1.5 Min before Paul. So what is the speed of Jack.

• let speed of paul =x kmph
  speed of jack=(x+1.5) kmph
  (10/x)-(10/x+1.5)=(1.5/60) hr
  solving we get
  x=23.75 kmph
  jack speed should be=25.25 kmph
• 9 years agoHelpfull: Yes(33) No(1)
• Let speed of paul =x kmph
  then speed of jack=x+1.5
  now the equation becomes
  (10/x)-(10/x+1.5)=1.5 min
  solving the equation we get
  x^2+1.5x-10=0
  x=2.5 and -4
  so paul speed=2.5kmph
  then Jack Speed=4kmph
• 9 years agoHelpfull: Yes(23) No(17)
• statement wrong it should be 1.5 hours
  then
  10/x-10/(x+1.5)=1.5
  we get x=2.5
  and jack speed is 4
• 9 years agoHelpfull: Yes(7) No(3)
• let speed of paul=x
  then speed of jack=x+1.5
  now the equation becomes-
  (10/x)-(10/x+1.5)=1.5
  solving the equation u get
  x^2+1.5x-10=0
  
  now in TCS paper options were given-
  
  a)2
  b)4
  c)8
  d)6
  
  by hit and trial subtract 1.5 from all the above and put in the above equation to get result.
  
• 9 years agoHelpfull: Yes(5) No(2)
• let speed of paul =x kmph
  
  speed of jack=(x+1.5) kmph
  
  (10/x)-(10/x+1.5)=(1.5/60)
  
  solving above equ.
  we get
  
  x=23.75 kmph
  
  paul speed = 23.75
  
  jack speed should be=25.25 kmph
• 9 years agoHelpfull: Yes(3) No(0)
• j=1.5 m/h let time taken by jack(x-1.5/60)
  ----------------------------
  p let speed s 10 km Let paul take x h to reach
  
  for paul from formula speed=d/t
  1.5=10/(x-1.5/60)
  we get x=803/120
  
  for paul s=10/x=10*120/803 simply putting value of x
  s=1.494 (ANSWER) ie paul speed less than jack
• 9 years agoHelpfull: Yes(2) No(9)
• I think it's 25.25kmph
• 9 years agoHelpfull: Yes(2) No(8)
• sorry for the wrong answer. the equation i m getting is:
  p^2 +1.5p -600=0
  where p=pauls speed
  and jake speed is j=1.5+p
• 9 years agoHelpfull: Yes(2) No(3)
• Let speed of Paul=x km/hr
  then
  speed of jack=(x+1.5)km/hr
  So a/q
  (10/x)-(10/(x+1.5))=(1.5/60)
  solve for x
  we get x=23.75 and x=-25.25(not possible)
  so speed of jack is 23.75+1.5=25.25 km/hr
• 9 years agoHelpfull: Yes(1) No(0)
• I THINK JACK SPEED IS 4 AND PAUL SPEED IS 2.5
• 9 years agoHelpfull: Yes(0) No(8)
• i am getting Jacks speed as 200 kmph.
• 9 years agoHelpfull: Yes(0) No(6)
• ANS=10KM/Hr
• 9 years agoHelpfull: Yes(0) No(1)
• the answer is 4
• 9 years agoHelpfull: Yes(0) No(1)
• If YOU CONVERT 1.5 MINUTE IN HOUR THEN ANSWER WILL BE 22.5 OTHERWISE 4
• 9 years agoHelpfull: Yes(0) No(1)