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972π×3=4π³
r³=2916/4
r³=729
r=∛729
r=9cm
Lkulit=Ls
Ls=2×π×r
=2×π×9
=18πcm²
972π = 4/3πr³
972 × 3/4 = r³
∛729 = r
r = 9
Lp = 4πr²
Lp = 4 x π x 9 x 9
Lp = 324π
maaf kalo salah