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904,32 = 4/3 . 3,14 . r³
904,32/3.14 = 4/3 . r³
288 . 3/4 = r³
r³ = 216
r = 6 cm
904,32 = 3,14 . r²
r² = 904,32 / 3,14
r² = 288
r = √288
r = 16,97 cm.
maaf saya cuman bisa jawab nomor 1. makasih