SOLUTION: A hospital staff mixed a 75% disinfectant solution with a 25% disinfectant solution. How many liters of each were used to make 30 L of a 40% disinfectant solution?

Question 940045: A hospital staff mixed a 75% disinfectant solution with a 25% disinfectant solution. How many liters of each were used to make 30 L of a 40% disinfectant solution?
Answer by mananth(16946) (Show Source): You can put this solution on YOUR website!
percent ---------------- quantity
Disinfectant I 75.00% ---------------- x L
Disinfectant II 25.00% ------ 30 - x L
Mixture 45.00% ---------------- 30
Total 30 L
75.00% x + 25.00% ( 30 - x ) = 45.00% * 30
75 x + 25 ( 30 - x ) = 1350
75 x + 750 - 25 x = 1350
75 x - 25 x = 1350 - -750
50 x = 600
/ 50
x = 12 L 75.00% Disinfectant I
18 L 25.00% Disinfectant II

m.ananth@hotmail.ca

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