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 4 days?
Select the correct option:
A) 2/5
B) 1/6
C) 1/4
D) 1/9
E) 2/9
A's one day's work = 1/30   B's one day's work = 1/45   (A + B)'s one day's work = 1/30 + 1/45 = 1/18   The part of the work completed in 4 days = 4 (1/18) = 2/9.   ANSW2/9R 2/9
<result>E</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 4 days?