The length of the rectangle ABCD is 28 cm and its width is 7 times less. What is the area of the rectangle?

To solve this problem, we will need to perform several different actions. First, in this task we need the formula for the area of a rectangle. It looks like this:

S = a * b

First, we need to know the width of the rectangle. It will be expressed like this:

b = 28: 7 = 4 (cm) – width.

Now we can substitute the given values into the formula and find out the area of the given rectangle. We get the following expression:

S = 28 * 4 = 112 (cm²) – the area of the rectangle ABCD.

Answer: 112 cm².