18. Jack walks faster than paul, both walks 24km each.sum of their speeds is 7kmph and sum of their times is 14 then find jacks speed.

• 24/x+24/(7-x)=14
  =>24(7-x)+24x=14(7x^2-x)
  =>168-24x+24=98x-14x^2
  =>14x^2-98x+168=0
  =>x^2-7x+12=0
  => x=3,4
• 9 years agoHelpfull: Yes(4) No(0)
• ans= 4kmph
• 9 years agoHelpfull: Yes(2) No(0)