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For duct sheet of thickness (zero point eight) mm , This is Gauge (twenty two) .
For Gauge (twenty two) , and assuming it is Galvanized Steel ,
the weight =1. LB/Ft2 (one point four zero six)
Which equals =6. Kg/m2 (six point eighty six)
The answer of your question is
=1/6. m2/Kg =0. m2/Kg (zero point one forty six)
