DERIVATION OF WEIGHT OF STEEL

                                                 

     

           Density  = Mass/Volume
           Density of Steel = 7850 Kg/m³
           And Volume of Steel = 𝛑D²L/4

           D- Diameter of Bar in mm
           L- length off bar in meter



note :- since diameter of bar in mm and length in meter,multiply L with 1000.

so,
             7850 =  Mass*4*1000/𝛑D²L
              Implies, mass = (7850*𝛑D²L)/(4*1000)

Hence,
                           

  Mass  =  D²L/162. pre m.

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