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 : Choices.
A) 5 B) 6 C) 7 D) 10 E) 12
Let no of cows be x, no of hens be y.   So heads=x+y   Legs=4x+2y   Now, 4x+2y = 2(x+y)+ 14   2x = 14   x = 7.   ANSWER:7
<result>C</result>
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 :