A circular tube has a wall thickness of 10 mm. It is required to carry a load of 1000 kN with a factor of safety of 2.0. The length of the tube is 4 m. What should be the outside diameter if the load is carried in?:
(a) Tension.(b) Compression with the tube acting as a pin-ended column
Assume the yield strength of steel is 400 MPa.