Question

A formula for finding SA, the surface area of a rectangular prism, is

Answer 1

Answer:

Option C.

Step-by-step explanation:

It is given that the surface area of a rectangular prism, is

$SA=2(ab+ac+bc)$

where a, b, and c represent the lengths of the edges of the prism.  

We need to find the surface area of this prism if a = 12 inches, b = 6 inches, and c = 4 inches.

Substitute a=12, b=6 and c=4 in the above formula.

$SA=2((12)(6)+(12)(4)+(6)(4))$

$SA=2(72+48+24)$

$SA=2(144)$

$SA=288$

The surface area of this prism is 288 sq.inches.

Therefore, the correct option is C.