A is half good a work man as B and together they finish a job in 14 days. In how many days working alone B finish the job? Choose the correct choice from the following.
A) 22 B) 21 C) 77 D) 99 E) 12
WC = 1:2   2x + x = 1/14 =&gt; x = 1/42   2x = 1/21 =&gt; 21 days   Answer: 21
<result>B</result>
A is half good a work man as B and together they finish a job in 14 days. In how many days working alone B finish the job?