Jake is faster than Paul. Jake and Paul each walk 24 kms. The sum of their speeds is 7 kmph and the sum of time taken by them is 14 hours. Then Jake speed is equal to

• Ans:4kmph
  let jake's speed x
  paul's speed y
  x+y=7kmph
  24/x+24/y=14
  12(x+y)=7xy
  12*7=7xy
  xy=12
  & x+y=7
  the above two equations are satiesfied if only when x=4,y=3 or x=3,y=4.
  here as jake is faster than paul x=4 & y=3.so jake speed =4kmph
• 9 years agoHelpfull: Yes(3) No(0)
• ans:4kmph
  
• 9 years agoHelpfull: Yes(0) No(1)
• x+y=7km d=st=>t=d/s
  we have to find x value
  y=7-x;
  24/x + 24/7-x =14;
  (7-x+x)/7x-x*x =7/12;
  7x*x+49x-84=0;
  (x-4)(x-3);
  Pick up 4>3;
• 8 years agoHelpfull: Yes(0) No(1)
• Ans: 4 kmph
  let jake's speed is x kmph
  paul's speed y kmph
  x+y=7kmph
  24/x+24/y=14
  12(x+y)=7xy
  12*7=7xy
  xy=12
  & x+y=7
  the above two equations are satiesfied if only when x=4,y=3 or x=3,y=4.
  since jake is faster than paul , jake speed =4kmph
• 7 years agoHelpfull: Yes(0) No(0)