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27 June, 22:10

A mixture contains forty ounces of glycol and water and is ten percent glycol. If the mixture is to be strengthened to twenty-five percent, how much glycol is to be added?

1. 4 oz

2. 8 oz

3. 10 oz

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Answers (2)
  1. 27 June, 22:18
    0
    40oz glycol and water

    10% is glycol

    4oz is glycol

    36oz is water

    if glycol is to be added to make glycol 25% of all then

    note: water does not change

    100-25=75

    water does not change so

    36oz=75%

    12=25%

    there should be 12 oz of glycol total

    4 now

    12-4=8

    8 oz should be added

    sorry, I just wrote what I was thinking

    answer is 8oz
  2. 27 June, 22:29
    0
    2. 8 oz ...
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