A can do a piece of work in 30 days while B can do it in 40 days. In how many days will they finish it together?  Answers:	A) 120/7	B) 95/8	C) 123/9	D) 150/7	E) None
1/30 + 1/40 = 7/120   Both can finish the work in 120/7 days   120/7nswer: 120/7
<result>A</result>
A can do a piece of work in 30 days while B can do it in 40 days. In how many days will they finish it together?