4) Michael, Ted, and Ron are going to paint Ron's bedroom together. Ron knows it would take him 3 hours, Ted thinks he can do it in 2 hours and Michael thinks it would take him 4 hours. If they are right, how long will it take them to do the job together? Express your answer to the nearest minute.
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- Assume the area to be painted is some easy number to work with, like 100 sq. feet.
- Ron can paint 100 sq. ft in 3 hours so he works at a rate of _________ sq. ft./hour
- Ted works at a rate of _______ sq. ft./hour
- Michael works at a rate ________ sq. ft./hour
- Together, in one hour, they can paint _________ sq. ft.
- Since they have only 100 sq. ft. to paint, it takes them:_________ hour = ______ minutes.
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