Theory of Structures
A steel rod 1 metre long having square cross section is pulled under a tensile load of 8 tonnes. The extension in the rod was 1 mm only. If Esteel = 2 × 106 kg/cm², the side of the rod, is

2 cm
1.5 cm
1 cm
2.5 cm

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Theory of Structures
Slenderness ratio of a long column, is

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

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