A is twice as good a work man as B and together they finish the work in 14 days. In how many days A alone can finish the work? Choose one.
A) 33  B) 77  C) 265  D) 21  E) 88
WC = 2:1   2x + x = 1/14 =&gt; x = 1/42   2x = 1/21   A can do the work in 21 days.   Answer: 21
<result>D</result>
A is twice as good a work man as B and together they finish the work in 14 days. In how many days A alone can finish the work?