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29 August, 18:09

How much water must be added to 10 gallons of solution that is 20% alcohol to dilute it to a solution that is only 5% alcohol?

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  1. 29 August, 19:30
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    10 of 20%=2 gallons

    if 5% = 2 gallons, then 100% = 100x2/5=40

    so 40-10 = 30 gallons water is needed
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