Two persons A and B can complete a piece of work in 15 days and 30 days respectively. If they work together, what part of the work will be completed in 5 days? Options:  A) 1/8  B) 1/3  C) 1/6  D) 1/2  E) 5/3
A's one day's work = 1/15   B's one day's work = 1/30   (A + B)'s one day's work = 1/15 + 1/30 = 1/10   The part of the work completed in 5 days = 5 (1/10) = 1/2.   Answer:1/2
<result>D</result>
Two persons A and B can complete a piece of work in 15 days and 30 days respectively. If they work together, what part of the work will be completed in 5 days?