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krawędź=7cm (7cm)^3=343 cm^3
V=Pp*H
V=5*2.25
V=11,25 cm3
2.
a(kwadrat)=49
a=7
V=Pp*H
V=49*7
V=343 cm (sześcienne)
***
49 cm² = x * x
49 cm² = 7 cm * 7cm
x = 7 cm
V = 7 cm * 7 cm * 7 cm = 343 cm³