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x=10(cm)
Pp=½*12*16
Pp=96(cm²)
Pb=672-2*96
Pb=480(cm²)
Pśb=480/4
Pśb=120(cm²)
Pśb=a*b
a*b=120
10*b=120
b=120/10
b=12(cm)
H=12cm
V=Pp*H
V=96*12
V=1152(cm³)