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Every Engg. know that =dia*dia/162.2 is Steel weight Formula, But very less people Know that orgin of 162.2 asumption.
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Answer Posted / vj
weight=density*volume
weight=density*area*length
here,density=7850kg/m^3=7850kg/1000000000mm^3=.00000785
now,
weight=.00000785*3.14*d^2*length/4
weight=.00000616225*d^2*length(m)
weight=.00616225*d*d
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