SSC JE Mechanical Engineering 2018 Set 2 Paper

"Slenderness ratio of a compression member is defined as the ratio of its effective length to least radius of gyration."
Slenderness ratio $=\frac{{\mathit{L}}_{\mathit{e}}}{\mathit{K}}$
For short column value of slenderness ratio is less than 80 and 80 to 120 is called medium colum.
Slenderness ratio above 120 is called long column.