A man has some hens and cows. If the number of heads be 46 and the number of feet equals 136, then the number of hens will be
Choose the correct option.
A) 22
B) 24
C) 26
D) 20
E) 28

Rationale: "explanation : let number of hens = h and number of cows = c number of heads = 46 = > h + c = 46 - - - ( equation 1 ) number of feet = 136 = > 2 h + 4 c = 136 = > h + 2 c = 68 - - - ( equation 2 ) ( equation 2 ) - ( equation 1 ) gives 2 c - c = 68 - 46 = > c = 22 substituting the value of c in equation 1 , we get h + 22 = 46 = > h = 46 - 22 = 24 i . e . , number of hens = 24 answer : b"
Answer: B