The alloy contains 18% copper. How many kilograms of alloy must be taken so that it contains 27 kilograms of copper.

The easiest way to solve this problem is using the proportion method. If the alloy contains 18% copper, then 100% of the alloy will weigh the number X. Let’s compose and solve the proportion:

18% – 27;

100% – H.

Where from:

X = 100 x 27/18;

X = 150 (kg).

Answer: in order for this alloy to have 27 kg of copper, you need to take 150 kg.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.