Solve the problem.
-It is necessary to have a 40% antifreeze solution in the radiator of a certain car. The radiator now has 20 liters of 20% solution. How many liters of this should be drained and replaced with 100% antifreeze to get the desired
Strength?
A) 5 L
B) 6.7 L
C) 10 L
D) 8 L

Question

Quizplus · Accepted Answer

Let x liters of 20% solution be drained and replaced with 100% antifreeze.Then, (20/100) * 20 + (100/100) * x = (40/100) * (20 + x)=> 4 + x = 8 + 0.4x=> 0.6x = 4=> x = 4/0.6 = 6.66 liters (approx.)

Solve the Problem. -It Is Necessary to Have a 40% Antifreeze Solution in Antifreeze