A and B can finish a work in 16 days while A alone can do the same work in 20 days. In how many days B alone will complete the work?  Choose the correct choice from the following options.
A) 76 days
B) 48 days
C) 80 days
D) 31 days
E) 22 days
B = 1/16 – 1/20 = 1/80 =&gt; 80 days   Answer: 80 days
<result>C</result>
A and B can finish a work in 16 days while A alone can do the same work in 20 days. In how many days B alone will complete the work?