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Math Help - Need help with this word problem.

  1. #1
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    Need help with this word problem.

    Question - How much water must be added to 15 L of alcohol to make a solution which is 60% alcohol?
    I need an equation to solve the answer.
    HELP PLEASE thanks
    Jo
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  2. #2
    RRH
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    Quote Originally Posted by bradycat View Post
    Question - How much water must be added to 15 L of alcohol to make a solution which is 60% alcohol?
    I need an equation to solve the answer.
    HELP PLEASE thanks
    Jo
    What is the starting concentration of the alcohol, or are we assuming it is 100%?
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  3. #3
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    That;s it for the question.
    So the 15L must be 100% alcohol.
    So would you say 0% of water with no value for the water, as X??
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  4. #4
    RRH
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    ok I had to back to the basics on this one

    <br />
\frac{15}{x}=\frac{60}{100}<br />

    solve for x, which will equal 25

    25-15=10

    I am sorry about the previous confusion for some reason this problem gave me a go for my money
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  5. #5
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    Thank you for your help, it kinda makes sense, will have to look at it a bit longer. THANKS.
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