A and B together can do a work in6 days. If A alone can do it in 42 days. In how many days can B alone do it?
Choose the correct option: A) 11 B) 7 C) 8 D) 20 E) 25
7   7   1/6 â€“ 1/42 = 1/7 =&gt; 7
<result>B</result>
A and B together can do a work in6 days. If A alone can do it in 42 days. In how many days can B alone do it?