Homework Help: Math

Posted by Simon on Tuesday, February 5, 2013 at 12:41pm.

A cylindrical tube is open at both ends.the internal diameter tube 10.4cm and its length is 25cm. If the thickness of the tube 8mm everywhere,find the total surface of area of the tube.

Math - Steve, Tuesday, February 5, 2013 at 2:20pm
inner diameter is 10.4
outer diameter is 11.2

A = π(25)(10.4+11.2) = 540π
Math - Simon, Wednesday, February 6, 2013 at 4:16am
Bt its ans is 1816.32cm^2
Math - Simon, Wednesday, February 6, 2013 at 4:34am
Plz help me

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