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Pp=5*12=60/2=30
Pb=6*(1/2*5*12)=6*30=180
Pc=(30*2)+180=240
V=5*5*12=300m3
b) wysokość=12, bo 2*6
Pp=2*12=24/2=12
Pb=6*(1/2*2*12)=6*12=72
Pc=(12*2)+72=96
V=2*2*12=48m3