Brass is an alloy of 60% copper and 49% zinc. How much copper do you need to take to make 300 kg of brass.

In order to find how much copper you need to take, to get 300 kg of brass, we will compose and decide the proportion.

But first, let’s look at and analyze the condition of the problem. It is known that brass is an alloy of 60% copper and 40% zinc.

Let’s start by assuming 100% the weight of all the brass. And using the variable x kg, we denote the weight of copper in the brass alloy.

Let’s move on to drawing up the proportions.

300 kg of brass – 100%;

x kg of copper – 60%.

300 / x = 100/60;

We are looking for an unknown average member:

x = (300 * 60) / 100 = 180 kg of copper.