Answer Posted / shubham jain

Volume×density=weight
(Volume=area×length mm^3)
for 1m of length
((22×r×r÷7)×1000)mm^3=volume
(Volume = 3142.857 r×r=785.714 d×d mm^3)
(Density=7856.34×10^-9kg/mm^3)
Weight= 785.714×d×d×7856.34×10^-9 kg/m
Weight=d×d×6.17283726×10^-3 kg/m
Or
weight=d×d÷
For example :- 8mm steel bar
weight=8×8÷162 kg/m
WEIGHT= 0.395 kg/m

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