Question

What is the surface area of this rectangular prism?



A.
78 cm2

B.
120 cm2

C.
158 cm2

D.
180 cm2

Answer 1

Do you have a picture of the prism :)

Answer 2

You can find the surface area by finding the area of all the sides and adding them together.

Answer 3

http://static.k12.com/calms_media/media/198500_199000/198516/1/8fbae48d688cbc84886acaea0d88d018b39bb9dc/26792-000575-1.jpg

Answer 4

Ok. So lets do the front first.
http://prntscr.com/76xupj
what's the length and width of this prism?

Answer 5

or rectangle. sorry

Answer 6

all three add up to 64

Answer 7

16 i mean

Answer 8

see the process in ur inbox

Answer 9

@narutoboy14

Answer 10

We have to find the areas of ALL the sides.
http://prntscr.com/76xupj
If the length of that rectangle outlined in red is 8 and the height is 3, what's the area?

Answer 11

24

Answer 12

@k_lynn A=2(wl+hl+hw) is the formula

Answer 13

yep. There's another matching one on the other side. It has the same area.
http://prntscr.com/76xvyw
24+24?

Answer 14

48

Answer 15

@sikinder I've always learned to do surface area by finding all the areas and adding them together.

Answer 16

@k_lynn but we have teach the people the simplest process

Answer 17

Yep @narutoboy14
we're going to need to remember that number.
http://prntscr.com/76xwl9
What's the area of that rectangle then?

Answer 18

@k_lynn soo by that formula we can do faster

Answer 19

Is that formula for just area or for surface area?

Answer 20

who should i give that medal to?

Answer 21

It doesn't matter. whoever gave you the most help.

Answer 22

Did you still need some help? @narutoboy14

Answer 23

yes

Answer 24

Ok. We found the area of the front and back rectangles. We can do the sides now.
http://prntscr.com/76xzdn
if the length is 5 and width is 3, what's the area?