Question
It takes Ivory 9 hours to sew a coat by herself. If Cathy helps her, they will take 5 hours to sew the coat. How long will Cathy take to sew the coat by herself? Express your answer in mixed number.
3 m

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It takes Ivory 9 hours to sew a coat by herself. If Cathy helps her, they will take 5 hours to sew the coat. How long will Cathy take to sew the coat by herself? Express your answer in mixed number.