$\"\"$

The formula for the surface area of a rectangular prism is $\"\"$ .

Find the surface area of the rectangular prism.

Observe the figure:

Here $\"\"$ , $\"\"$ and $\"\"$ .

$\"\"$ (Formula for the surface area of the prism)

$\"\"$ (Substitute $\"\"$ , $\"\"$ and $\"\"$ )

$\"\"$ (Multiply)

$\"\"$ (Add: $\"\"$ )

Therefore, the surface area of the rectangular prism is $\"\"$ .

$\"\"$

The surface area of the rectangular prism is $\"\"$ .