The mass of the alloy consisting of copper, bronze and silver is 15.4 kg. find the mass of silver if the mass of bronze is 65%

The mass of the alloy consisting of copper, bronze and silver is 15.4 kg. find the mass of silver if the mass of bronze is 65% of the mass of the alloy and the mass of copper is 0.8 parts of the remainder.

Let’s find the mass of bronze in the alloy:
M br = 15.4 / 100 * 65 = 10.01.

Let’s find the mass of silver and copper in the alloy:
15.4 – 10.01 = 5.39 kg.

M copper = 5.39 * 0.8 = 4.312 kg.

M Serb = 5.39 * 0.2 = 1.078 kg.

Examination:
10.01 + 5.39 + 4.312 + 1.078 = 15.4

Answer: The mass of silver in an ingot is 1.078 kg.