4. The total Number of cows and hens in a certain farm house is 80. The total number of their legs is 270 then find the cows and

1 thought on “4. The total Number of cows and hens in a certain farm house is 80. The total number of their legs is 270 then find the cows and”

1. Step-by-step explanation:

   let the number of cows x

   and number of hens y

   then x+y=80

   => y=80-x

   again,

   each cow have 4 legs and each hen have 2 legs

   so,

   4x+2y=270

   => 2(2x+y)=270

   => 2x+y=270/2=135

   => y=135-2x

   so,

   135-2x=80-x

   => -x+2x=135-80

   => x=55

   so,number of cow is 55

   and number of hen =80-55=25

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