Question

I will medal :)
What is the surface area of the rectangular prism?
http://static.k12.com/calms_media/media/1422500_1423000/1422983/2/bd63321765b6a78e9bdca0e63a3c7078c66cebe8/MS_PA_131002_171342.jpg

Answer 1

What is the surface area of the figure?
http://static.k12.com/calms_media/media/1422500_1423000/1422985/1/319d88c1b12d98a6afa5e92521264dc25a2b6dfc/MS_PA_131002_171344.jpg

Answer 2

@iPwnBunnies

Answer 3

For the surface area of a rectangular prism, it will be the sum of the areas of each side. Since each side, including the top and bottom, are rectangular it's easy. Plus, 4 of the sides would have the same area.

Answer 4

For the first one?

Answer 5

Yes.

Answer 6

The total surface area of a rectangular prism is the sum of the lateral area (all vertical faces) and the areas of the two bases (the horizontal faces).

Lateral area = perimeter of base * height
Lateral area = (2L + 2W) * H
Area of bases = 2 * L * W

Total surface area = (2L + 2W)H + 2LW

Answer 7

The above is for the first question.

Answer 8

Ohh thanks! :)

Answer 9

For the second one, you need to add the areas of all the external faces.

Answer 10

I did, but I didnt get one of the answer choices, so I guesses, and I got it right and got 100% on my test XD

Answer 11

Calculate them by using the area of a rectangle many times. Then add them all up.

Answer 12

You are talking about the first one or second one?

Answer 13

Let's start from the beginning. What did you get for the first one?

Answer 14

Uh 310, I think...my notes dont make sense XD
I was talkin about the second one

Answer 15

310 in.^2 is correct for the first one.

Answer 16

Now the second one.

Answer 17

Ok. :)

Answer 18

What is x?

Answer 19

896ft?

Answer 20

Are you asking if that is the final answer?

Answer 21

Oops. XD
Sorry, that was for something else.

X=16?

Answer 22

Use the circled lengths to find x.
x can't be 16 ft because it can't be more than 14 ft.