Question
Fiona and Zara take 2 hours to clean the villa together. If Fiona takes 4 hours to clean the villa on her own, how long will it take Zara to clean the villa alone?
3 m

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Fiona and Zara take 2 hours to clean the villa together. If Fiona takes 4 hours to clean the villa on her own, how long will it take Zara to clean the villa alone?