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14 October, 05:51

Two neighbors, wilma and betty, each have a swimming pool. both wilma's and betty's pools hold 9900 gallons of water. if wilma's garden hose fills at a rate of 900 gallons per hour while betty's garden hose fills at a rate of 500 gallons per hour, how much longer does it take betty to fill her pool than wilma?

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  1. 14 October, 05:59
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    To solve this problem we will start by calculating time needed for each of them to fill the pool.

    We have formula:

    Volume = rate * time

    Or

    time = volume / rate

    Wilma:

    time = 9900 / 900

    time = 11h

    Betty:

    time = 9900 / 500

    time = 19.8h

    Now we substract these two numbers:

    time_difference = 19.8 - 11 = 8.8h

    Betty needs 8.8 hours more than Wilma to fill the pool.
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