Question
It takes Gabby 9 hours to sew a coat by herself. If Usha helps her, they will take 7 hours to sew the coat. How long will Usha take to sew the coat by herself? Express your answer in mixed number.
3 m

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It takes Gabby 9 hours to sew a coat by herself. If Usha helps her, they will take 7 hours to sew the coat. How long will Usha take to sew the coat by herself? Express your answer in mixed number.