SOLUTION: Peter can mow the lawn in 40 minutes and john in 60 minutes.how long will it takes for them to mow the lawn together?

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Question 477812: Peter can mow the lawn in 40 minutes and john in 60 minutes.how long will it takes for them to mow the lawn together?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Consider what part each of them does per minute.
email via the TY note for help, or to check your work.