3 liter larutan garam berkadar 30% dicampur dengan 7 liter larutan garam berkadar 60%. Berapa kadar garam campuran?

Answer and explanation

Correct answer: D. 51%

Garam total = (3 x 30 + 7 x 60) per 100 liter-persen = 510; volume total 10 liter, sehingga kadar = 51%.

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