Question

A dance floor is in the shape of a rectangle. It is 21 meters long and16 meters wide. What is its perimeter?

Answer 1

Answer: The perimeter is 74 meters.

Explanation:

21 plus 21 plus 16 plus 16 = 74

Answer 2

`P = 74\ meters`

Explanation:

By definition the perimeter of a rectangle is the sum of the lengths of its 4 sides.

The formula for calculating the perimeter of a rectangle is as follows:

`P = 2w + 2l`

Where P is the perimeter, w is the width and l is the length.

In this case we want to find P and we know that:

`w =16\ meters`

`l =21\ meters`

Therefore:

`P = 2(16) + 2(21)`

`P = 32 + 42`

`P = 74\ meters`