Question

calculati aria bazei.raza.generatoarea a unui con circ circular drept daca inaltimea ete de 4cm si volumul de 108π

Answer 1

V=$\pi$$R^{2}$h/3
108$\pi$$R^{2}$*4/3
108=$R^{2}$*4/3
324=$R^{2}$*4
$R^{2}$=324/4=81
R=$\sqrt{81}$=9 cm
Ab=$\pi$$R^{2}$=81$\pi$ $cm^{2}$
$G^{2}$=$R^{2}$+$h^{2}$=81+16=97
G=$\sqrt{97}$