A can do a piece of work in 30 days; B can do the same in 30 days. A started alone but left the work after 10 days, then B worked at it for 10 days. C finished the remaining work in 10 days. C alone can do the whole work in?
Select the correct option.
A) 30 days B) 65 days C) 86 days D) 45 days E) 17 days
10/30 + 10/30 + 10/x = 1   x =30 days   30 daysnswer:30 days
<result>A</result>
A can do a piece of work in 30 days; B can do the same in 30 days. A started alone but left the work after 10 days, then B worked at it for 10 days. C finished the remaining work in 10 days. C alone can do the whole work in?