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Verified answer
Posisi 1d = 3 cm --> r = 1,5 cm
t = 5,5 cm
Volume tabung
= Volume 1/2 bola + tabung tanpa 1/2 bola
= 1/2 . 4/3 πr³ + πr² . (5,5 - 1,5)
= 2/3 π.r³ + 4πr²
= πr² (2/3 r + 4)
Posisi 2
V = πr² (2/3 r + 4) = πr² t
t = tinggi air pd tabung posisi 2
t = 2/3 r + 4
t = 2/3 . 1,5 + 4
t = 3/3 + 4
t = 1 + 4
t = 5 cm
Jadi tinggi air pd tabung posisi 2 = 5 cm