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a=5
Pp=6*a²=6*5²=6*25=150 dm²
2.
Pp1=54cm2,
Pp2=96cm2,
Pp3=150cm2
Pp1=6*a1²=54 -> a1²=54/6
a1²=9
a1=3
V1=a1³=3³=9cm³
Pp2=6*a2²=96 -> a2²=96/6
a2²=16
a2=4
V2=a2³=4³=64cm³
Pp3=6*a3²=150 -> a3²=150/6
a3²=25
a3=5
V3=a3³=5³=125cm³
V=V1+V2+V3=9+64+125=150cm³
a³=150 cm³
a=5,31
Pp=6*a²=6*5,31²=6*28,20=169,2 cm²