Answer / prabhu

=(PI/4)*d*d*7850
=Pi/4x7850xdxd
=6165.376xdxd
=(1/6165.376) x 1000 x 1000 x dxd
=dxd/162

Answer / rafeez

density of steel x area of bar you get the direct value
7850 x t/d2

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