Sabc=2(ab+bc+ac)=2(0.3*0.4+0.4*0.2+0.3*0.2)=0.56 m2
1dm2=0.01m2
0.01m2=2 g
0.56m2=x g
x=0.56*2 / 0.01 = 112 g
Sabc=2(ab+bc+ac)=2(0.3*0.4+0.4*0.2+0.3*0.2)=0.56 m2
1dm2=0.01m2
0.01m2=2 g
0.56m2=x g
x=0.56*2 / 0.01 = 112 g