Posted by George on .
A cardboard tube is loaded with a 15.3 N axial load. The tube has an outside diameter of 2.5 cm and a wall thickness of .035 cm. Find the axial stress in the cardboard tube.
Is the answer 75 N/cm^2?
If so can you show me your way of getting to this answer.

Engineering/Algebra 
Damon,
approximate area by 2 pi r dr
A = 2 pi (1.25)(.035) = .275 cm^2
15.3 / .275 = 55.6