Theory of Structures
parabolic arch of span and rise , is given by The equation of a

y = 3h/l² × (1 – x)
y = 4h/l² × (1 – x)
y = h/l² × (1 – x )
y = 2h/l² × (1 – x)

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Theory of Structures
Slenderness ratio of a long column, is

Length of column divided by least radius of gyration
Area of cross-section divided by least radius of gyration
Radius of gyration divided by area of cross-section
Area of cross-section divided by radius of gyration

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