A car radiator needs a 60% antifreeze solution. The radiator now holds 30 liters of a 50% solution. How many liters of this should be drained and replaced with 100% antifreeze to get the desired strength?
A car radiator needs a 60% antifreeze solution. The radiator now holds 30 liters of a 50% solution. How many liters of this should be drained and replaced with 100% antifreeze to get the desired strength?
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