Solve the problem.It is necessary to have a 40% antifreeze solution in the radiator of a certain car. The radiator now has 70 liters of 20% solution. How many liters of this should be drained and replaced with 100% antifreeze to get the desired strength?
A. 28 L
B. 23.3 L
C. 17.5 L
D. 35 L
Answer: C
Mathematics
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