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Pp=1/2*6*10
Pp=30cm kwadratowych
V=1/3*Pp*H
3V/Pp=H
H=3*200/30
H=20cm
b)H=3*H-graniastosłupa, ponieważ we wzorze na objetosc ostroslupow jest ulamek 1/3
H=3*9
H=27cm