SOLUTION: David needs to have a 20% solution of antifreeze and water in his radiator. If the radiator of truck contains 8 quarts of a solution of antifreeze and water, with 10% being antifre

Question 982455: David needs to have a 20% solution of antifreeze and water in his radiator. If the radiator of truck contains 8 quarts of a solution of antifreeze and water, with 10% being antifreeze, how much antifreeze must be added to create the desired solution?
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
The description implies that the capacity of the radiator is greater, larger than 8 quarts.

Has 10%; wants or needs 20%;

Let v be amount of pure antifreeze to add.
, setup using decimal fractions instead of percents;

, simply multiplied both sides by 10

and again,...

, how many quarts of pure antifreeze to add.
Answer by MathTherapy(10552) (Show Source): You can put this solution on YOUR website!

David needs to have a 20% solution of antifreeze and water in his radiator. If the radiator of truck contains 8 quarts of a solution of antifreeze and water, with 10% being antifreeze, how much antifreeze must be added to create the desired solution?

Amount of antifreeze to add: quart
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