A can do a piece of work in 13 days and B in 20 days. They began the work together but 5 days before the completion of the work, A leaves. The work was completed in?	Options:
A) 15 10/11 days  B) 10 10/11 days  C) 12 10/11 days  D) 19 10/11 days  E) 13 10/11 days
10 10/11 days   (x â€“ 5)/13 + x/20 = 1   x = 10 10/11 days
<result>B</result>
A can do a piece of work in 13 days and B in 20 days. They began the work together but 5 days before the completion of the work, A leaves. The work was completed in?