SOLUTION: 4 builders take 10 days to build a certain wall. How long will it take for 5 builders to build a certain wall?

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Question 808243: 4 builders take 10 days to build a certain wall. How long will it take for 5 builders to build a certain wall?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
4*10=40 work days
40/5=8 days