The safe stress for a hollow steel column which carries an axial load of 2100 kN

Question

The safe stress for a hollow steel column which carries an axial load of 2100 kN is 125 MN/m². if the external diameter of the column is 30cm, what will be the internal diameter?

Options:

A . 25 cm

B . 26.19cm

C . 30.14 cm

D . 27.9 cm

Answer: Option B
Answer: (b).26.19cm

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