MATH TEST TOMMOROW GRADE 9 PLEASE HELP MEE

Question

anonymous · Answer

I'll be glad to help you. Don't stress over your test. You have plenty of time to practice. Ask me anything.

anonymous · Answer

ok thank you a cylinder has a Surface area of 1017.9cm what is its volume??

anonymous · Answer

?

anonymous · Answer

Sorry, I'm trying to figure it out.

anonymous · Answer

ok

anonymous · Answer

2pi*radius*height is the surface area and Pi*pi*radius * height is volume

anonymous · Answer

The basic formula for finding the volume of a cylinder is (pi)(r^2)(h).

anonymous · Answer

so how do i find volume given the surface area

anonymous · Answer

What is the entire question that is on your worksheet?

anonymous · Answer

Does it have a diagram or anything?

anonymous · Answer

that is it

anonymous · Answer

no diagram

anonymous · Answer

Well, to find the surface area of a cylinder, you do 2(pi)(r^2) + 2(pi)(r)(h).

anonymous · Answer

i know that nvm no help

anonymous · Answer

im screwed for test tmmrw

anonymous · Answer

Do you know the height?

anonymous · Answer

no

anonymous · Answer

That question is impossible, since you don't know the height. That's ridiculous.

anonymous · Answer

i am sending you a link..read the question..its similar to your question http://answers.yahoo.com/question/index?qid=20080521212740AALF1ki

anonymous · Answer

no its not lol my teacher did it on the board today i just forgot how he did it

anonymous · Answer

what u do here is find the max possible volume

anonymous · Answer

Aha! You have to do substitution. I'll walk you through it.

anonymous · Answer

yep substitution...just dont forget that the can is closed not open

anonymous · Answer

Is the surface area 1017.9 *squared* centimeters?

anonymous · Answer

1017.9 is 324*pi

anonymous · Answer

and are u sure u are talking about surface area..your question said 1017.9CM....if it is surface area it is supposed to be CM square

anonymous · Answer

Yes, I think it is supposed to be 1017.9 cm^2, but the question is impossible. You need to know either the height or the radius.

anonymous · Answer

i feel it is the perimeter ..which is 2pi*radius + 2h..but again...you have none of the terms...

anonymous · Answer

Exactly. Something seems odd.

anonymous · Answer

You could work backwards if you knew either the radius or the height, but you know none of that. Take a picture of the worksheet and show us. It's worth a try.