Question

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4. I got LA=28 terms of pi and SA=36 in terms of pi


I got the LA right, but I keep getting 36 for the SA. What am I doing wrong?

Answer 1

@jhonyy9

Answer 2

how you get the SA ?

Answer 3

SA = circumference of circle *7

you have do it same ?

Answer 4

SA=2pi4+LA
SA=8pi+28
SA=36pi

Answer 5

ohhh sorry i meant lateral area

Answer 6

LA = 2pir *7

Answer 7

Yep

Answer 8

so and what you said that not can you getting right ?

Answer 9

The SA is supposed to be 32 pi according to my teacher but I got 36 pi

Answer 10

SA = 2*pir^2 + LA

SA = 2*4pi +28pi

SA = 8pi +28pi = 36pi

Answer 11

you can getting 32pi for SA just than this cylinder has on the top open
do you understand me - not is closed just bottom and on the top is open

bc. in this way you add to 28pi just 4pi and so will result 32pi

ok. dear my friend ?

Answer 12

or than you check this image this cylinder has marked the radius just on the top so i think that bottom - down - is open and so hence you get for SA = 32pi

Answer 13

I'm a bit confused What do you mean I can get 32 pi?

Answer 14

hope this is clearly now for you

was my pleasure

good luck

bye bye

Answer 15

same your teacher for SA = 32pi
not hence you wrote there above ?

Answer 16

@jhonyy9

Yes that was her answer but I got 36pi

Answer 17

but than you see and than his is true that this cylinder is open down so bottom so than in this case you get like result for SA =32pi

Answer 18

than this is true

sorry there missed the t from this

Answer 19

do you understand me - just in this way you can getting 32pi for SA