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fritz can build a bookcase in 8 hours and holly can build it in 10 hours. after working together for 3 hours, fritz leaves. how long will it take holly to finish the bookcase by herself?
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fritz can build a bookcase in 8 hours and holly can build it in 10 hours. after working together for 3 hours, fritz leaves. how long will it take holly to finish the bookcase by herself?

User Aprian
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7 votes
5 hours is the correct amount of time
User Vmonteco
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