The alloy consists of copper and zinc, the weight of which is 3: 2, the weight of the alloy is 2.5 kg.

The alloy consists of copper and zinc, the weight of which is 3: 2, the weight of the alloy is 2.5 kg. How much copper is in the alloy and how much zinc.

1. Let’s find how many parts are in the alloy, if the ratio of the masses of copper and zinc is 3: 2.
3 + 2 = 5.
2. Since the mass of the alloy is 2.5 kg, we find the weight of one of 5 parts:
2.5 / 5 = 0.5 kg.
3. Find the mass of copper and zinc in the alloy by multiplying the mass of one part by the corresponding number of parts:
Copper = 3 * 0.5 = 1.5 kg.
Zinc = 0.5 * 2 = 1 kg.
Answer: the mass of copper in the alloy is 1.5 kg, and the mass of zinc is 1 kg.

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