<PRE><B>Question 969446</B>
Same problem, different numbers.
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Pure acid is to be added to a 20 percent acid solution to obtain 48 L of a 40 percent acid solution. What amounts of each should be used?
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T = amount of 20%
P = amount of pure (100%)
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T + P = 48 (total liquid)
20T + 100P = 48*40 (total acid)
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20T + 100P = 1920
T + 5P = 96
T + P = 48
---------------------- Subtract
4P = 48
etc </PRE>