Chapter A.8, Problem 39AYU

To determine

To find: How much water should be added?

Answer to Problem 39AYU

Add $\frac{2}{3}$ gallons of water.

Explanation of Solution

Given:

1 gallon of pure antifreeze to obtain a solution that is $60\%$ antifreeze?

Calculation:

$\frac{1}{1+x}=0.60$

$1=0.6\left(1+x\right)$

$1=0.6x+0.6$

$0.6x=0.4$

Therefore $x=0.6667$.

That is add $\frac{2}{3}$ gallons of water.