How to calculate the unit weight of M.S. Angle?

For 1 meter

Angle size = 20 mm x 20 mm x 3 mm

Volume of A = 20 mm x 30 mm x 1 m

= 0.02 x 0.03 x 1

= 0.006 m³

Volume of B = 20 mm x 17 mm x 1 m

= 0.02 x 0.017 x 1

= 0.0034 m³

Density of steel is 7850 kg/m³

Weight of angle = [Volume of A + Volume of B] x 7850

= [0.006 + 0.0034] x 7850

= 0.9 kg