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r bola = 5 cm
tinggi air awal = 15 cm
Vtabung = V6bola
πr²t = 6. 4/3 πr³
π10²t = 8π5³
100πt=1000π
t=1000π / 100π
t=10 cm
Tinggi air sekarang
= tinggi air awal + tinggi ada bola
= 15 cm + 10 cm
= 25 cm
Jawaban D