A man has some hens and cows. If the number of heads be 48 and the number of feet equals 136, then the number of hens will be: Choose one.
A) 22  B) 23  C) 24  D) 26  E) 28
let hens be x and cows be y   now,   feet: x*2+y*4=136   heads: x*1+y*1=48   implies, 2x+4y=136 and x+y=48   solving these two equations, we get x=28 and y=20   Therefore, hens are 28.   ANSW28R:28
<result>E</result>
A man has some hens and cows. If the number of heads be 48 and the number of feet equals 136, then the number of hens will be: