In a group of cows and hens, the number of legs are 12 more than twice the number of heads. The number of cows is :
Select the correct option
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)+ 12   2x = 12   x = 6.   ANSWER:6
<result>B</result>
In a group of cows and hens, the number of legs are 12 more than twice the number of heads. The number of cows is :