Two persons A and B can complete a piece of work in 30 days and 45 days respectively. If they work together, what part of the work will be completed in 3 days?  Choose the correct choice from the following choices
A) 2/5
B) 1/6
C) 1/4
D) 1/9
E) 2/6
1/6   1/6   A's one day's work = 1/30   1/6's one day's work = 1/45   (A + 1/6)'s one day's work = 1/30 + 1/45 = 1/18   The part of the work completed in 3 days = 3 (1/18) = 1/6.
<result>B</result>
Two persons A and B can complete a piece of work in 30 days and 45 days respectively. If they work together, what part of the work will be completed in 3 days?