A can do a piece of work in 11 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?  Select the correct option.
A) 15 10/31 days	B) 10 10/31 days	C) 12 10/31 days	D) 19 10/31 days	E) 13 10/31 days
10 10/31 days   (x â€“ 5)/11 + x/20 = 1   x = 10 10/31 days
<result>B</result>
A can do a piece of work in 11 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?