The perimeter of the rectangle is 42 cm, and the ratio of its length to width is 4: 3. Find the area of the rectangle.

The solution of the problem:
1. Find out what the sum of the numbers is equal to in relation to the length and width of the rectangle.
4 + 3 = 7;
2. Find out how many centimeters are in one part.
42/7 = 6 centimeters.
3. Let’s calculate what the length of the rectangle is.
6 * 4/2 = 12 centimeters.
4. What is the width of the rectangle?
6 * 3/2 = 9 centimeters.
Let’s answer the question of the problem.
5. Find what the area of the rectangle is.
12 * 9 = 108 square centimeters.
Answer: The area of a rectangle is one hundred and eight square centimeters.