tolong nomer 4 dong :)))

Vol air naik = vol kerucut
3,14 x 9 x 9 x t = 1/3 x 3,14 x6x6x10
9 x 9 x t = 2 x 6 x 10
t = (2 x 6 x 10) / (9 x 9)
t = 1,48 cm

Tinggi air sekarang = 15 + 1,48
= 16,48 cm