In a group of cows and hens, the number of legs are 14 more than twice the number of heads. The number of cows is
A. 5
B. 7
C. 10
D. 12
Answer: Option B
Solution(By Examveda Team)
Let the number of cows be x and the number of hens be y.Then, 4x + 2y = 2 (x + y) + 14 ⇔ 4x + 2y = 2x + 2y + 14 ⇔ 2x = 14 ⇔ x = 7.
This Question Belongs to Competitive Reasoning >> Arithmetic Reasoning
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then X is the no of cows and how many hens are there ?