Question
Kylie and Yoko take 3 hours to clean the villa together. If Kylie takes 4 hours to clean the villa on her own, how long will it take Yoko to clean the villa alone?
3 m

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Kylie and Yoko take 3 hours to clean the villa together. If Kylie takes 4 hours to clean the villa on her own, how long will it take Yoko to clean the villa alone?