A and B together can complete work in 4 days. A alone starts working and leaves it after working for 3 days completing only half of the work. In how many days it can be completed if the remaining job is undertaken by B? Choices
A) 4
B) 8
C) 5
D) 6
E) 7
Explanation:   (A+B) one day work =1/4   now A does half of the work in 3 days so A can complete the whole work in 6 days   A’s one day work =1/6   B’s one day work=1/4 - 1/6= 1/12   B alone can complete the work in 12 days so half of the work in 6 days   Answer: Option 6
<result>D</result>
A and B together can complete work in 4 days. A alone starts working and leaves it after working for 3 days completing only half of the work. In how many days it can be completed if the remaining job is undertaken by B?