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25 hours? Not sure what you are asking. Maybe you mean how much time to wash house if you wash 15 in 25 hours? 15/25 is the rate of house washed per hour===3/5 and 3/5(60min)=180/5=36min So you can wash each house in 36 min. Is that what you wanted to know?

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16y ago

What else can I help you with?