A and B undertake to do a piece of work for $500. A alone can do it in 5days while B alone can do it in 10days. With the help of C, they finish it in 2days. Find the share of C?	Answers.
A) $200  B) $150  C) $300  D) $25  E) $100
C's 1day work = (1/2)-(1/5 + 1/10) = 1/5   $200:B:C= 1/5 : 1/10: 1/5 = 2:1:2   B's share = 500*2/5= 
<gadget id="calculator">500*2/5</gadget>
<output>200</output>
$200   $200nswer is $200
<result>A</result>
A and B undertake to do a piece of work for $500. A alone can do it in 5days while B alone can do it in 10days. With the help of C, they finish it in 2days. Find the share of C?