Question

The radius of the base of a cylinder is 28 cm, and the height of the cylinder is 48 cm. Find the surface area of the cylinder in terms of pi

Answer 1

whats the formula for this?

Answer 2

If the cylinder is open ended, like a pipe, then the surface area is just (2)(pi)(r))(h). If the cylinder is closed ended then just add the area for each circular top piece, which each have (pi)(r^2) areas.

Answer 3

but everytime I use the normal formula the number is to big cause this keeps saying by pi well what formula then? I use the normal cylinder SA formula

Answer 4

Ha not sure what you mean by all of that, but my answer is correct so just think about it. I think about it like as if we were to cut the cylinder right up the side, and lay it out. It would be a rectangle, with length h and width (2)(pi)r

Answer 5

would you like me to post a question with the same concept that has a photo so you can see what I mean? @chemENGINEER

Answer 6

No, I know what you mean. I have seen this problem countless times. Do you understand my first answer?

Answer 7

Not really..

Answer 8

I mean like I said I just dont understand what its talking about when it says by pi cause I try the SA formula and its way to big..