A can finish a work in 18 days and B can do the same work in half the time taken by A. Then, working together, what part of the same work they can finish in a day? Choose the correct choice from the following answers:
A) 1/4
B) 1/6
C) 4/6
D) 1/2
E) 1/8
Given that B alone can complete the same work in half the time taken by A   = 9days   A’s one day work = 1/18   B’s one day work = 1/9   (A+B)’s one day work = 1/18+1/9 = 1/6. Answer is 1/6.
<result>B</result>
A can finish a work in 18 days and B can do the same work in half the time taken by A. Then, working together, what part of the same work they can finish in a day?