The area of the playground is 72 m2, its width is 6 m. Find the length of the playground.

The playground area has the shape of a rectangular shape. And the area of a rectangle is length times width, or width times length.
In order to calculate the unknown side of the rectangle, we compose an equation in which we denote the unknown side by x.
6 * x = 72.
We are looking for an unknown factor, according to the rule:
x = 72/6.
x = 12 meters – is the second side of the rectangular figure.
To summarize: the length of the playground is only twelve meters.