To find: How much of this mixture should be drained and replaced by pure antifreeze so that the system is filled with a solution that is antifreeze?
Answer to Problem 40AYU
5 litres need to be drained and replaced with pure antifreeze.
Explanation of Solution
Given:
The cooling system of a certain foreign-made car has a capacity of 15 litres. If the system is filled with a mixture that is antifreeze.
Calculation:
Let liters of mixture to be drained and replaced with pure antifreeze.
litres of antifreeze in the system at beginning.
litres of antifreeze that will be removed by draining.
litres of antifreeze left in system after draining.
litres of antifreeze left in system after draining with pure antifreeze.
Therefore .
5 litres need to be drained and replaced with pure antifreeze.
Chapter A.8 Solutions
Precalculus Enhanced with Graphing Utilities
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