A can do a piece of work in 5 days and B can do it in 4 days how long will they both work together to complete the work?	Choose the correct choice from the following options:
A) 6/11 B) 8/9 C) 7/9 D) 2/9 E) 10/11
Explanation:   A’s one day work = 1/5   B’s one day work = 1/4   (A+B)’s one day work = 1/5 + 1/4 = 9/20 =&gt; time = 20/9 = 2 2/9 days   Answer: Option 2/9
<result>D</result>
A can do a piece of work in 5 days and B can do it in 4 days how long will they both work together to complete the work?