The alloy contains 2 parts of copper and 7 parts of tin, how many kilograms of copper are in the alloy
| September 2, 2021 | education
The alloy contains 2 parts of copper and 7 parts of tin, how many kilograms of copper are in the alloy, if the mass of the alloy is 23.4.
The alloy contains 2 parts of copper and 7 parts of tin, which means that the alloy contains 9 parts equal in weight.
1) 2 + 7 = 9 (parts) is contained in the alloy.
The total weight of the alloy is 23.4 kg, and it consists of nine parts, so the weight of one part is 2.6 kg.
2) 23.4: 9 = 2.6 (kg) weight of one piece.
The weight of one part is 2.6 kg, and in the alloy there are 2 such parts of copper, which means the total weight of copper in the alloy is 5.2 kg.
3) 2 * 2.6 = 5.2 (kg) is copper in the alloy.
Answer: The alloy contains 5.2 kg of copper.
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