George does 3/5th of a piece of work in 9 days. He then calls in Paul , and they finish the work in 4 days. How long would Paul take to do the work by himself?
Select the correct option
A) 30
B) 40
C) 50
D) 60
E) 70
100% work will be done by George in 15 days   (1/15)9+(1/15+1/x)4=1   solving this eqn.   we get x=30   hence Paul take to do the work in 30 days   30NSWER:30
<result>A</result>
George does 3/5th of a piece of work in 9 days. He then calls in Paul , and they finish the work in 4 days. How long would Paul take to do the work by himself?