If L is the actual length of a column and k its minimum radius of gyration, the Euler's formula is applicable to determine critical load for a column having both ends hinged, only if
AL/k≥ 80
BL/K≥ 80
CL/K ≤80
DL/K ≤ 120
AL/k≥ 80
BL/K≥ 80
CL/K ≤80
DL/K ≤ 120