Calculate Rectangle Perimeter: 18 × 2 Units Problem

Calculate the perimeter of the rectangle below.

To solve this problem, we'll start by identifying the given dimensions of the rectangle: the length $l = 18$ and the width $w = 2$.

Next, we apply the perimeter formula for a rectangle, which is given by:

$P = 2(l + w)$

Substitute the given values for the length and width into the formula:

$P = 2(18 + 2)$

Calculating further, we find:

$P = 2 \times 20 = 40$

Thus, the perimeter of the rectangle is $40$. Among the provided answer choices, this corresponds to choice 1.