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8 November, 13:30

Both Wilma's and Betty's pools hold 9000 gallons of water. If Wilma's garden hose fills at a rate of 750 gallons per hour while Betty's garden hose fills at a rate of 650 gallons per hour, how much longer does it take Betty to fill her pool than Wilma?

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  1. 8 November, 13:31
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    Wilma: 9000/750 = 12 hours

    Betty: 9000/650 = 13.85 hours

    13.85-12 = 1.85 hours approx.

    That is 1 hour and 51 minutes.

    answer: 1 hour and 51 minutes approx.
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