A can do a job in 18 days and B can do it in 30 days. A and B working together will finish twice the amount of work in days?  Choose the correct choice
A) 29 ½ days
B) 22 ½ days
C) 92 ½ days
D) 28 ½ days
E) 92 ½ days
1/18 + 1/30 = 8/90 = 4/45   45/4 = 11 ¼ *2   =22 ½ days   Answer:22 ½ days
<result>B</result>
A can do a job in 18 days and B can do it in 30 days. A and B working together will finish twice the amount of work in days?