Q. A person has certain number of cows and birds.they have 172 eyes and 344 legs. How many cows and birds does he have?

• He has only cows 86
  
  86*2=172 eyes
  86*4=344 legs
• 12 years agoHelpfull: Yes(4) No(3)
• => Number of cows = a
  Number of birds = b
  so total number of eyes are
  => 2a + 2b = 172
  
  total number of legs are
  
  => 4a + 2b = 344
  
  so solving these equations we get
  
  0 birds and 86 cows.
• 9 years agoHelpfull: Yes(2) No(0)
• Equations for legs and eyes would be respectively :
  4c+2b = 344
  2c+2b = 172
  
  Solving we get number of cows = 86 and birds = 0
• 6 years agoHelpfull: Yes(0) No(0)
• x+y=86
  2x+y=172
  x=cows=86
  y=birds=0
• 6 years agoHelpfull: Yes(0) No(0)
• There is only 86 cows and 0 birds.
• 2 years agoHelpfull: Yes(0) No(0)