Can someone me
i would appreciate it .

i would mark brainliest if its right only.

(explain)
(not adding)

The answer is:  " 318 cm² " .

Explanation:


This is a rectangular prism.

The [lateral] surface area of a prism has 6 sides.

Every side of a rectangular prism has a "corresponding side" with the same [lateral] surface.

So, we take the [lateral] surface area of one side of the rectangular prism (i.e. "length * width" ) ; and multiply that by "2".
 
Then we take the [lateral] surface area another side [that is DIFFERENT from the (aforementioned 2 sides— i.e. "length * width)] ; and multiply that value by "2" .

Finally, we take the [lateral] surface area of another side  [that is DIFFERENT from the (aforementioned 4 sides— i.e. "length * width)] ; and multiply that value by "2" . 

Then, we add these values —the values of these "lateral surface areas"—together;  to get the total [lateral] surface area of the entire rectangular prism.

As such:

2(9 cm * 6 cm)  + 2(7 cm * 9cm) + 2(6cm *7cm) ;

=  2(54 cm²)  + 2(63 cm²) + 2(42 cm²) ; 

=  108 cm²  +  126 cm²  +  84 cm²  ;

                      =  234 cm²  +  84 cm² ;

                      =  318 cm² .