Question

Look at the rectangular prism and its net.

What is the surface area of this rectangular prism?



A.
24 cm2

B.
72 cm2

C.
96 cm2

D.
192 cm2

Answer 1

The formula is SA=Ph+2B
First find the perimeter. The formula for that is P=2L+2w
The perimeter is 32.

SA=32*3+2*12 (I think its 12 for base)
SA=96+24
SA= 120 cm2

Answer 2

The equation to find the surface area of a prism is:
h * P + 2 * b
H = Height
P = Perimeter
B = Area of Base

To find the perimeter you have to do this equation:
2l + 2w
L = length
W = width

2 * 12 + 2 * 4 = 32
P = 32

Then finding the area of base using this equation:
L * W

12 * 4 = 48
B = 48

Now, put it all together
H = 3
P = 32
B = 48

3 * 32 + 2 * 48 = 192 cm^2
Hope this helps!