40 litres of 60% concentration of an acid solution is added to 35 litres of 80% concentration of the acid solution. What is the concentration of acid in the new solution?

40 litres of 60% concentration of an acid solution is added to 35 litr

1.	40 litres of 60% concentration of an acid solution is added to 35 litres of 80% concentration of the acid solution. What is the concentration of acid in the new solution?
A.	69%
B.	\(69\frac{1}{3}\% \)
C.	66%
D.	\(66\frac{2}{3}\% \)
Answer» C. 66%

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40 litres of 60% concentration of an acid solution is added to 35 litres of 80% concentration of the acid solution. What is the concentration of acid in the new solution?

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