A man counted his animals, 80 heads and 280 legs (ducks and goats). how many goats are there?
Select:	A) 30	B) 40	C) 50	D) 60	E) 70
let no of ducks=d and no of goat=g   d+g=80(heads)----------&gt; eq 1   each duck has 2 legs and goat has 4 legs   2d+4g=240 and divide 2d+4g=240 by 2 we get d+2g=140 -----------&gt; eq2   subtract eq1 from eq2   we get no of goats=60   ANSWER:60
<result>D</result>
A man counted his animals, 80 heads and 280 legs (ducks and goats). how many goats are there?