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kereshmeh
18.03.2021 •
Mathematics
Mr. Daly, a chemistry teacher needs 10 liters of a 20% saline solution for his afternoon class. Unfortunately, the only mixture he has is a 5% saline and a25% saline solution. How much of each solution should he mix to produce the 20% solution?
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Ответ:
2.5L of 5% saline and 7.5L of 20% saline solution
Step-by-step explanation:
Ответ:
C = 2 × pi × r
where r is the radius. So for your problem...
C = 2 × 3.14 × 4
C = 25.12 meters