Question

What is the surface area of the composite figure?

Link:



http://learn.flvs.net/webdav/assessment_images/educator_math2/v9/07_TB_20_100.jpg

Answer 1

A. 256
B. 384
C. 512
D. 544

Answer 2

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Answer 3

?

Answer 4

@jdoe0001 now?

Answer 5

notice your shapes, both figures are just 2 rectangular "tubes"
each is really just 6 rectangles stacked up to each other at the edges

so get the area of each of the rectangles and sum them up

Answer 6

sorry i lost connection

Answer 7

i got 160 and 416

Answer 8

@jdoe0001

Answer 9

i got 160 and 416 \(\checkmark\)

Answer 10

so the Area of the whole shape, will be their sum, that is 160 + 416

Answer 11

but what about inteior faces

Answer 12

interior*

Answer 13

hmmm

Answer 14

yes, you're right, you'd need to subtract half of the top rectangle for the small one

and that same quantity to the bigger one, since that interior part, of where they join, do not Surface out

that'd be a 4x4 and a 4x4

so... (160 - 4 * 4) + (416 - 4*4) => 160-16+416-16 => 144 + 400

Answer 15

thank you, I tried many times but somehow it didnt work

Answer 16

yw