A can complete the job in 3 hours and B can complete the same job in 3 hours. A works for 1 hour and then B joins and both complete the job. What fraction of the job did B complete Select the correct option:
A) 1/6
B) 3/10
C) 1/2
D) 5/6
E) 8/9
1/6=1/6
<result>A</result>
A can complete the job in 3 hours and B can complete the same job in 3 hours. A works for 1 hour and then B joins and both complete the job. What fraction of the job did B complete