12m-dlug.
12m-7m=5m-szer.
12m x 0,25 (25%) =3m
obj.sali=12m x5m x3m=180m³
1m³=1 000dm³
180m³ =180 000dm³
180 000dm³ x1,29g\dm³=232200g=232,2kg----masa powietrza
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12m-dlug.
12m-7m=5m-szer.
12m x 0,25 (25%) =3m
obj.sali=12m x5m x3m=180m³
1m³=1 000dm³
180m³ =180 000dm³
180 000dm³ x1,29g\dm³=232200g=232,2kg----masa powietrza