1/18 + 1/30 = 8/90 = 4/45
45/4 = 11 1/4 *2 = 22 1/2 days
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?
A) 22 1/6
B) 22 1/2
C) 22 1/0
D) 22 1/9
E) 22 1/1