SOLUTION: a 5 foot long cylindrical pipe has an inner diameter of 6 feet and an outer diameter of 8 feet. what is the total surface area(inside and out, including the ends)?

Algebra ->  Surface-area -> SOLUTION: a 5 foot long cylindrical pipe has an inner diameter of 6 feet and an outer diameter of 8 feet. what is the total surface area(inside and out, including the ends)?      Log On


   

Question 242896: a 5 foot long cylindrical pipe has an inner diameter of 6 feet and an outer diameter of 8 feet. what is the total surface area(inside and out, including the ends)?
Found 2 solutions by nyc_function, JimboP1977:
Answer by nyc_function(2741) About Me  (Show Source):
You can put this solution on YOUR website!
If you give me your e-mail, I can send you a reply using paint attachment, which is far easier to read and follow. With paint, I can also draw geometric shapes.
I'll wait for your reply.
Write to: nycfunction@yahoo.com
Guido

Answer by JimboP1977(311) About Me  (Show Source):
You can put this solution on YOUR website!
Do you know the formula for the surface area of a cylinder? It is A+=+%282%2APi%2Ar%5E2%29%2B2%2APi%2Ar%2Ah
Where A is the total surface area, r is the radius, and h is the height.
The total surface area is equal to the larger outside cylinder's side plus inside's cyclinder side plus 2 times the difference of each end. Algebraically:
%282%2APi%2A4%2A5%29%2B%282%2APi%2A3%2A5%29%2B%282%2APi%2A4%5E2%29-%282%2APi%2A3%5E2%29
This all equals 263.9 feet^2 (to 4 significant figues)
Does that make sense?