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H=5cm
V=Pp*H
Pp=3a²√3/2
Pp=3*3²√3/2
Pp=27√3/2 cm²
V=27√3*5/2
V=135√3/2 cm³
Pc=2Pp+Pb
Pb=6aH
Pb=6*3*5
Pb=90cm²
Pc=27√3+90
Pc=9(3√3+10) cm²