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If my math is correct it would take an additional ( .6 of a U.S. quart of

antifreeze ) to increase a 30 % antifreeze volume to 40 % if the total

volume of the mixture is 6 quarts

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Q: How many quarts of pure antifreeze must be added to 6 quarts of a 30 percent antifreeze solution to abtain a 40 percent antifreeze solution?
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