What is the perimeter of a rectangle that has a length of 10 m and a width of 5 m?

To determine the perimeter of a rectangle, the formula used is:

Perimeter = 2 × (length + width)

In this case, the length of the rectangle is 10 meters, and the width is 5 meters.

First, you would add the length and width together:

10 m + 5 m = 15 m

Next, you would multiply the sum by 2 to calculate the perimeter:

2 × 15 m = 30 m

This shows that the perimeter of the rectangle is 30 meters, which corresponds to one of the answer choices. The understanding of how perimeter is calculated relies on recognizing that a rectangle has two lengths and two widths, hence the multiplication by 2 after summing the two dimensions.