In a group of cows and hens, the number of legs are 8 more than twice the number of heads. The number of cows is :
Choose the correct choice
A) 5  B) 6  C) 7  D) 10  E) 4
Let no of cows be x, no of hens be y.   So heads=x+y   Legs=4x+2y   Now, 4x+2y = 2(x+y)+ 8   2x = 8   x = 4.   ANSW4R:4
<result>E</result>
In a group of cows and hens, the number of legs are 8 more than twice the number of heads. The number of cows is :