SOLUTION: The radiator in a car is filled with a solution of 75% antifreeze and 25% water. The manufacturer of the antifreeze suggests that for summer driving, optimal cooling of the engine

Question 486402: The radiator in a car is filled with a solution of 75% antifreeze and 25% water. The manufacturer of the antifreeze suggests that for summer driving, optimal cooling of the engine is obtained with only 50% antifreeze. If the capacity of the radiator is 3.6 L, how much coolant should be drained and replaced with water to reduce the antifreeze concentration to the recommended level?
L
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
The radiator in a car is filled with a solution of 75% antifreeze and 25% water.
The manufacturer of the antifreeze suggests that for summer driving, optimal cooling of the engine is obtained with only 50% antifreeze.
If the capacity of the radiator is 3.6 L, how much coolant should be drained and replaced with water to reduce the antifreeze concentration to the recommended level?
:
Let x = amt to be drained and amt of water to be added to accomplish this
:
.75(3.6-x) = .50(3.6)
2.7 - .75x = 1.8
-.75x = 1.8-2.7
-.75x = -.9
x =
x = + 1.2 liters to be drained and replaced with 1.2 liters of water
RELATED QUESTIONS
The radiator in a car is filled with a solution of 75 percent antifreeze and 25 percent... (answered by josmiceli)

The radiator in a car is filled with a solution of 60% antifreeze and 40% water. The... (answered by Edwin McCravy)

A car radiator is filled with 5 liters of 25% antifreeze solution. How many liters must... (answered by ankor@dixie-net.com)

A car radiator contains 5 liters of a 25% antifreeze solution. How many liters must be... (answered by nerdybill)

A mechanic needs a radiator to have 30% antifreeze solution. The radiator currently is... (answered by josgarithmetic)

The radiator in a car is filled with a solution of 65 percent antifreeze and 35 percent... (answered by ptaylor)

The radiator in a car is filled with a solution of 65% antifreeze and 35% water. The... (answered by richwmiller,stanbon)

The radiator in a car is filled with a solution of 80% antifreeze and 20% water. The... (answered by ptaylor)