A and B can finish a work in 12 days while A alone can do the same work in 20 days. In how many days B alone will complete the work?
Select
A) 76 days  B) 30 days  C) 98 days  D) 31 days  E) 22 days
30 days = 1/12 – 1/20 = 2/60 = 1/30=&gt; 30 days   Answer: 30 days
<result>B</result>
A and B can finish a work in 12 days while A alone can do the same work in 20 days. In how many days B alone will complete the work?