A can do a piece of work in 15 days. A does the work for 5 days only and leaves the job. B does the remaining work in 12 days.In how many days B alone can do the work?  Select the correct option.
A) 5days B) 7 days C) 12 days D) 9 days E) 18 days
18 daysxplanation:   A’s 5 day work = 5*1/15=1/3   Remaining work = 1-1/3=2/3   B completes 2/3 work in 6 days   B alone can do in x days   2/3*x=12   X=18 days   Answer: Option 18 days
<result>E</result>
A can do a piece of work in 15 days. A does the work for 5 days only and leaves the job. B does the remaining work in 12 days.In how many days B alone can do the work?