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2x3x4+2x4x2,5+2x3x2,5=24+20+15=59cm2
Pole=2*(3*4)+2*4*2,5+2*3*2,5=24+20+15=59
V=3 cm*4cm*2,5cm
V=30
Pc= 2ac + 2bc + 2ab
Pc=2*(3*2,5)+2*(4*2,5)+2*(3*4)
Pc=2*7,5+2*10+2*12
Pc=15+20+24
Pc=59