A and B together can do a work in 5 days. If A alone can do it in 15 days. In how many days can B alone do it?
Pick one.
A) 25/2 B) 15/2 C) 17/2 D) 19/2 E) 11/2
1/5 – 1/15 = 2/15   =&gt; 15/2   ANSWER:15/2
<result>B</result>
A and B together can do a work in 5 days. If A alone can do it in 15 days. In how many days can B alone do it?