A can finish a piece of work in 5 days. B can do it in 15 days. They work together for two days and then A goes away. In how many days will B finish the work?  Choose the correct choice from the following:
A) 3 days  B) 5 days  C) 4 days  D) 6 days  E) 7 days
2/5 + (2 + x)/15 = 1 =&gt; x = 7 days   ANSW7 daysR:7 days
<result>E</result>
A can finish a piece of work in 5 days. B can do it in 15 days. They work together for two days and then A goes away. In how many days will B finish the work?