Finish the following sentence with the best choice: how to find perimeter of a rectangle

Choices:
- Perimeter = 2 X Lengths + 2 X Widths + 2 x lengths    P = 2l + 2w
- Perimeter = 2 X Lengths + 2 X Widths    P = 2l + 2w

Answer:
Perimeter = 2 X Lengths + 2 X Widths    P = 2l + 2w