The alloy contains 8% copper. How many kilograms of copper is contained in 360 kg of this alloy?

To solve this problem, we introduce a conditional variable “X”, through which we denote the amount of copper contained in 360 kilograms of the alloy. To do this, let’s make the following proportion: 360 kilograms of alloy are related to 100 percent as X kilograms of copper are related to 8 percent. Now, based on the proportion, we will make the following equation: X = 360 x 8/100 = 28.8 kilograms of copper. Answer: 360 kilograms of alloy contains 28.8 kilograms of copper.