/

Question

/

anonymous · Answer

@ganeshie8 @saifoo.khan @myininaya

anonymous · Answer

@chosenmatt @k_lynn @Crissy15

anonymous · Answer

I'm not sure if any of you guys know how to do this, but I'm very stuck.

k_lynn · Answer

Do you know the area formula for a cylindar?

crissy15 · Answer

2πrh is the formula

anonymous · Answer

No.

anonymous · Answer

But I did just google it, so I know a little bit about it now.

anonymous · Answer

2* pi * r * h + 2 * pi * r^2

k_lynn · Answer

$$A = \pi rh +2 \pi r$$

k_lynn · Answer

ya, do you know where to plug in the numbers to solve?

anonymous · Answer

No

anonymous · Answer

3.14 * 5 (I think) * 9 ... maybe?

anonymous · Answer

I'm not sure...

k_lynn · Answer

You know I"m not entirely sure how to do this...the shape isn't even in the form of a cylinder.... @e.mccormick do you know how to do this?

k_lynn · Answer

@midhun.madhu1987 how about you?

crissy15 · Answer

http://www.virtualnerd.com/tutorials/?id=PreAlg_11_01_0030 5 is the radius so what is 9? the height?

anonymous · Answer

yes it's the height I think.

anonymous · Answer

This is stressing me out lol.

crissy15 · Answer

so the answer i know should be AL≈282.74 don't know how to explain it though 
its stressing -.-

anonymous · Answer

it's supposed to be in inches^2 but I don't know.

anonymous · Answer

oh I'm supposed to express it in pi as well.

crissy15 · Answer

yup its stressing its been years since i did this um my teacher taught me like this, i wasn't patient
AL=2*pi*r*h

crissy15 · Answer

its unfolded so its easier the cyclinder

anonymous · Answer

I don't know what to do.

crissy15 · Answer

look solve this 
2(3.14)(5)(9)

anonymous · Answer

that's 282.6

crissy15 · Answer

i got 282.6 in sq. sone if its just the lateral you need to find

anonymous · Answer

is there a formula for that?

crissy15 · Answer

yea what i had said earlier AL=2*pi*R*H

anonymous · Answer

so 2 * 3.14 * 5 * 9?

anonymous · Answer

@Crissy15

crissy15 · Answer

yup

anonymous · Answer

324.99 so then would I divide that by pi?

crissy15 · Answer

The answer you had before was your answer 282.6 inches squared, but if you also needed to find the surface area then thats a whole different story. I had posted a video all the way up top, that explains what I did.

anonymous · Answer

but it has to be in terms of pi. So would I then divide 282.6 by pi