A man has some hens and cows. If the number of heads be 48 and the number of feet equals 140, then the number of hens will be:  Choose the correct choice from the following answers.
A) 22  B) 24  C) 26  D) 28  E) 30
Let the number of hens be x and the number of cows be y.   Then, x + y = 48 .... (i)   and 2x + 4y = 140   x + 2y = 70 .... (ii)   Solving (i) and (ii) we get: x = 26, y = 22.   The required answer = 26.   Answer is 26.
<result>C</result>
A man has some hens and cows. If the number of heads be 48 and the number of feet equals 140, then the number of hens will be: