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b=2
c=4 wymiary prostopadloscianu
V=abc objetosc prostopadloscianu
V=5*2*4
V=40
P=2( ab+ac+bc)
P=2(5*2+5*4+2*4)
P=2(10+20+8)
P=2*38
P=76 Objetosc wynosi 40 ; pole pow. 76