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?
Choose the correct option:
A) 10
B) 20
C) 30
D) 40
E) 50
9day 3/5   1 day 1/15   remaing 1-3/5=2/5   both can do 2/5 work in 4 day   one day work of both=1/10   therfor paul would take 1/10-1/15=1/30 or 30 days   ANSWER:30
<result>C</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?