<PRE><B>Question 797925</B>
A 40L solution of salt water contains 15% salt. What is the least amount of water that can be added to form solution that is no more than 5% salt?
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Equation:
water + water = water
0.85*40 + 1*x = 0.95(40+x)
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85*40 + 100x = 95*45 + 95x
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5x = 10*45
x = 90L (amt. of water needed)
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Cheers,
Stan H.</PRE>