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.
A) 43
B) 26
C) 33
D) 21
E) 28

Rationale: "b 26 let the number of hens be x and the number of cows be y . then , x + y = 48 . . . . ( i ) and 2 x + 4 y = 140 x + 2 y = 70 . . . . ( ii ) solving ( i ) and ( ii ) we get : x = 26 , y = 22 . the required answer = 26 ."
Answer: B