A is twice as good a work man as B and together they finish the work in 12 days. In how many days A alone can finish the work?	Choose the correct option.
A) 23  B) 18  C) 77  D) 92  E) 61
WC = 2:1   2x + x = 1/12 =&gt; x = 1/36   2x = 1/18   A can do the work in 18 days.   Answer: 18
<result>B</result>
A is twice as good a work man as B and together they finish the work in 12 days. In how many days A alone can finish the work?