A solution contains6 % salt. How much water should be added to 70 ounces of this solution to make a 4.2 % solution?

Question

Marely Mack

Mathematics

7 April, 09:35

A solution contains6 % salt. How much water should be added to 70 ounces of this solution to make a 4.2 % solution?

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Answers (1)

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Alberto Schwartz · Answer 1

0.06 (70) = 4.2 oz salt

4.2=4.2% in how much total

4.2=4.2% of total

4.2=0.042 times total

divide both sides by 0.042

100 = total

70+what=100

what=30

30 oz of water must be added