The rectangle is 6 cm long and 21 cm2 in area. Find the width of the rectangle.

In order not to lose the important values ​​that are given to us in the tasks, for a start we will correctly form it:

Given: rectangle, length 6 cm, area 21 cm².

Find: width =?

In order to solve the problem given to us, we need to write down the formula for finding the area of ​​a rectangle.

Formula for the area of ​​a rectangle:

Area = width * length.

Let’s substitute everything we know into this formula:

21 = width * 6.

Let the width be x, then the formula will look like this: 21 = x * 6.

Let us express x:

x = 21 \ 6.

We need to write the answer as a mixed number, so we select the whole part of the fraction:

3 3 \ 6 \ u003d 3 + 3 \ 6.

Answer: Width = 3 + 3 \\ 6.