A can finish a piece of work in 15 days. B can do it in 30 days. They work together for 6 days and then A goes away. In how many days will B finish the work?
Choose the correct choice:
A) 11 days	B) 12 days	C) 14 days	D) 10 days	E) 15 days
6/15 + (6 + x)/30 = 1 =&gt; x = 12 days   Answer: 12 days
<result>B</result>
A can finish a piece of work in 15 days. B can do it in 30 days. They work together for 6 days and then A goes away. In how many days will B finish the work?