A farm has only chickens and pigs. When the manager of the farm counted the heads of the animals on the farm, the number totaled up to 60. When the number of legs was counted, the number totaled up to 160. How many more chickens than pigs are there on the farm? Note: Each pig has 4 legs and each chicken had 2 legs. Select
A) 16	B) 20	C) 24	D) 28	E) 32
Let x be the number of chickens.   Then 60-x is the number of pigs.   2x+4(60-x)=160   2x=80   x=40 (chickens)   60-x=20 (pigs)   There are  40-20= 
<gadget id="calculator"> 40-20</gadget>
<output>20</output>
20 more chickens on the farm.   The answer is 20.
<result>B</result>
A farm has only chickens and pigs. When the manager of the farm counted the heads of the animals on the farm, the number totaled up to 60. When the number of legs was counted, the number totaled up to 160. How many more chickens than pigs are there on the farm? Note: Each pig has 4 legs and each chicken had 2 legs.