A can do a piece of work in 12 days. When he had worked for 2 days B joins him. If the complete work was finished in 8 days. In how many days B alone can finish the work?
Choose the correct choice
A) 2 days
B) 25days
C) 9 days
D) 18 days
E) 3 days
Explanation:   8/12 + 6/x = 1   X = 18 days   Answer: 18 days
<result>D</result>
A can do a piece of work in 12 days. When he had worked for 2 days B joins him. If the complete work was finished in 8 days. In how many days B alone can finish the work?