What is the perimeter of a rectangle with a length of 10 cm and a width of 4 cm?

To find the perimeter of a rectangle, you can use the formula:

Perimeter = 2 × (length + width).

In this case, the length is 10 cm and the width is 4 cm. Plugging these values into the formula gives:

Perimeter = 2 × (10 cm + 4 cm) = 2 × 14 cm = 28 cm.

Thus, the perimeter of the rectangle is 28 cm. This is the correct calculation based on the definition of perimeter for a rectangle, which requires both the length and the width to be included in the addition before multiplying by 2. This demonstrates a clear understanding of how to apply the formula for perimeter effectively.