Question

the figure shows a net of a rectangular prism. which expression can be used to find the surface area of the prism? 2(20 8)+2(20 3)+2(8 * 3). what is the surface area of the prism? s.a. = ___ cm²

Explanation:

Step1: Recall surface - area formula

The surface - area formula for a rectangular prism is $SA = 2(lw+lh + wh)$, where $l$ is length, $w$ is width, and $h$ is height. Here, $l = 20$ cm, $w = 8$ cm, $h = 3$ cm.

Step2: Calculate each product

$2(lw)=2(20\times8)=320$, $2(lh)=2(20\times3)=120$, $2(wh)=2(8\times3)=48$.

Step3: Sum up the products

$SA=320 + 120+48=488$ $cm^{2}$.

Answer:

$488$