How many gallons of pure water must be added to 10 gal of 30% salt water to make a solution that is 25% salt water?
1 answer:
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Answer:
Step-by-step explanation:
<em>a</em> - side of square
The formula of a perimeter of a square:
We have P = 48. Substitute:
<em>divide both sides by 4</em>
You can use the Pythagorean theorem, and calculate the length of a diagonal or use the formula of a diagonal of a square:
Substitute:
