Răspunsuri

2014-05-29T19:58:43+03:00
1m² h=80g

16,8cm=0,168m
21,9cm=0,219m

A=0,168*0,219=0,036792m²

1m²h..................80g
0,036792m²...........x

x=0,036792*80
x=2,94336g
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