SOLUTION: If 50 persons take 30 days to do 40 works,then how many days will 25 person take to do 20 works?

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Question 548376: If 50 persons take 30 days to do 40 works,then how many days will 25 person take to do 20 works?
Answer by Edwin McCravy(20054) About Me  (Show Source):
You can put this solution on YOUR website!
If 50 persons take 30 days to do 40 works,then how many days will 25 person take to do 20 works? 
50 persons take 30 days to do 40 works,

25 persons is half of 50 persons.  Half as many persons will take twice 
as long, so

25 persons take 60 days to do 40 works.

20 works is half of 40 works.  25 persons can do half as many works in 
half the time, so

25 persons can do 20 works in 30 days.

Edwin