Question
Gwen and Opal take 3 hours to clean the villa together. If Gwen takes 5 hours to clean the villa on her own, how long will it take Opal to clean the villa alone?
3 m

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Gwen and Opal take 3 hours to clean the villa together. If Gwen takes 5 hours to clean the villa on her own, how long will it take Opal to clean the villa alone?