A and B together can do a work in 6 days. If A alone can do it in 15 days. In how many days can B alone do it?
Select:
A) 10  B) 99  C) 77  D) 55  E) 21
1/6 – 1/15 = 1/10   =&gt; 10   10nswer: 10
<result>A</result>
A and B together can do a work in 6 days. If A alone can do it in 15 days. In how many days can B alone do it?