In a group of cows and ducks, the number of legs are 24 more than twicw thw number of heads the total number of cows are

• let the no of cows be x & no of ducks be y.
  therefore,
  
  also need to remember cows have 4 legs & ducks have 2.
  
  4x+2y=2*(x+y)+24
  4x+2y=2x+2y+24
  2x=24
  x=12.
• 7 years agoHelpfull: Yes(15) No(4)
• Legs = 24 + 2 *heads --------(1)
  Cows have 4 legs and ducks have 2 legs
  so legs = 4 cows + 2 ducks ------(2)
  Both Cow and Duck have one head
  so head= cow + duck------(3)
  Use 2 and 3 in (1)
  4 cows + 2 ducks= 24 + 2* (cow + duck)
  2 cows =24
  cows =12
  
  thus number of cows will be 12
• 7 years agoHelpfull: Yes(5) No(0)
• l=4c+2d
  h=c+d
  from given data
  l=2h+24
  so
  4c+2d=2c+2d+24
  c=12
  number of cows c=12
• 7 years agoHelpfull: Yes(1) No(0)
• 4X+2Y= 2(X+Y)+ 24 @@@ 2X=24 @@ X=12
• 7 years agoHelpfull: Yes(0) No(0)
• l=4c+2d--->1
  h=c+d------>2
  from given problem
  l=2h+24----->3
  from 1 & 2
  4c+2d=2c+2d+24
  2c=24
  c=12
• 7 years agoHelpfull: Yes(0) No(0)
• Let "L" = total # of legs.
  Let "H" = total # of heads.
  --------------------------------
  L = 2H + 24
  ---
  # of legs = 4c + 2d where c = # of cows and d = # of ducks
  # of heads = c + d
  
  Now
  H=c+d
  L=4c+2d
  --------------------
  Equations:
  Since L = 2H + 24,
  4c + 2d = 2(c+d) + 24
  4c+2d = 2c+2d+24
  --
  2c = 24
  C = 12 (# of cows)
• 6 years agoHelpfull: Yes(0) No(0)