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:	A) 1/5	B) 1/1	C) 1/6	D) 1/3	E) 1/7
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 3 days = 3 (1/18) = 1/6.   Answer: 1/6
<result>C</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?