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a = 10 cm
Pb = Pp + 125√3
Pp = a²√3/4
Pp = 10²√3/4 = 100√3/4 = 25√3 cm²
Pb = 25√3 + 125√3 = 150√3 cm²
Pb = 3a *h
150√3 = 3*10* h
150√3 = 30 h /: 30
h = 150√3/30
h = 5√3 cm
V = Pp*h
V = 25√3 * 5√3 = 125*3 = 375 cm³
odp ; Objetosc tego graniastoslupa wynosi 375 cm³