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The most economical section for a column is

ARectangular

BSolid round

CFlat strip

DTubular section

Answer:

D. Tubular section


Related Questions:

The error in measured length due to sag of a chain or tape is known as
പ്രായോഗിക ബുദ്ധിമാപനം ആദ്യമായി അവതരിപ്പിച്ചത് :
The member used in inclined position for supporting the strainer post is :
Sphere radius is represented by the symbol in drawing
22.43 -0.852 =