Question

what is the surface area of this rectangular prism? 20 ft. 9 ft. 16 ft. square feet

Explanation:

Step1: Identify the formula

The surface - area formula of a rectangular prism is $SA = 2(lw+lh + wh)$, where $l$ is the length, $w$ is the width, and $h$ is the height. Here, $l = 16$ ft, $w = 9$ ft, and $h = 20$ ft.

Step2: Calculate $lw$

$lw=16\times9 = 144$ square feet.

Step3: Calculate $lh$

$lh=16\times20 = 320$ square feet.

Step4: Calculate $wh$

$wh=9\times20 = 180$ square feet.

Step5: Calculate the sum inside the parentheses

$lw + lh+wh=144 + 320+180=644$ square feet.

Step6: Multiply by 2

$SA = 2\times644=1288$ square feet.

Answer:

1288