SOLUTION: Roxanne, Peter, and Cal can complete a job in three days. Roxanne can do the job in 8 days and Peter can do it in 10 days. How many days will it take Cal to complete the job?

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Question 925970: Roxanne, Peter, and Cal can complete a job in three days. Roxanne can do the job in 8 days and Peter can do it in 10 days. How many days will it take Cal to complete the job?
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
Sum of the rates...

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Answer by MathTherapy(10552) About Me  (Show Source):
You can put this solution on YOUR website!

Roxanne, Peter, and Cal can complete a job in three days. Roxanne can do the job in 8 days and Peter can do it in 10 days. How many days will it take Cal to complete the job?


By himself, Cal takes: highlight_green%289%263%2F13%29 days

You can do the check!! 

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