A man counted his animals, 80 heads and 240 legs (ducks and goats). how many goats are there?
Choose the correct choice from the following choices:
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=120 -----------&gt; eq2   subtract eq1 from eq2   we get no of goats=40   ANSWER:40
<result>B</result>
A man counted his animals, 80 heads and 240 legs (ducks and goats). how many goats are there?