A is half good a work man as B and together they finish a job in 26 days. In how many days working alone B finish the job?	Select.
A) 98 days  B) 21 days  C) 17 days  D) 39 days  E) 19 days
WC = 1:2   2x + x = 1/26 =&gt; x = 1/78   2x = 1/78 =&gt; 39 days   Answer:39 days
<result>D</result>
A is half good a work man as B and together they finish a job in 26 days. In how many days working alone B finish the job?