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Ls=πrs
65π=π×5×s⇒phi nya di coret dua duanya
65=5s
s=65/5
s=13cm
t=√s²-r²
=√13²-5²
=√169-25
=√144
t=12cm
V=1/3×π×r²×t
=1/3×π×5²×12
=100π (C)