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V=Pp*h
Pp=3a²√3/2
Pp=3*8²√3/2=96√3
V=96√3*8=768√3 dm³
Pc=2Pp+6Pb
Pb=Obp*h
Obp=6*8=48 dm
Pb=48*8=384 dm²
Pc=2*68√3+6*384=186√3+2304 dm²