A is twice as good a work man as B and together they finish the work in 10 days. In how many days A alone can finish the work?  Select the correct option
A) 23
B) 15
C) 77
D) 92
E) 61
WC = 2:1   2x + x = 1/10 =&gt; x = 1/30   2x = 1/15   A can do the work in 15 days.   Answer: 15
<result>B</result>
A is twice as good a work man as B and together they finish the work in 10 days. In how many days A alone can finish the work?