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r³=3V/4π
r³=3 . 972π/4π
r³=729
r=³√729
r=9 cm
L=4πr²
L=4π9²
L=324π cm²
Jawab A
V= 972π cm³
ditanya
luas kulit bola?
jawab
V= 4/3×π×r³
972= 4/3×π×r³
r³= 972/4/3×π
= 972×3/4π
= 243×3
= 729
r=∛729
r= 9
luas bola= 4×π×r²
= 4×π×9²
= 4×π×81
=324π
Jadi, luasnya adalah 324π cm² (a)