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
A) 1/9 B) 1/6 C) 1/2 D) 1/1 E) 1/4
Given that 1/6 alone can complete the same work in days = half the time taken by A   = 9days   A’s one day work = 1/18   1/6’s one day work = 1/9   (A+1/6)’s one day work = 1/18+1/9 = 1/6   Answer : 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?