Problema Solution
The capacity of a car radiator is 18 quarts. If it is full of a 20% antifreeze solution, how many quarts must be drained and replaced with a 100% solution to give 18 quarts of a 39% solution?
Answer provided by our tutors
Let 'x' represent the amount that needs to be replaced.
0.20(18 - x) + 1.00*x = 0.39*18
........
click here to solve the equation for x
........
x = 4.275 qt
4.275 quarts needs to be drained and replaced with 100% solution.