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t1 = tinggi air dalam tabung = 25 cm
rb= 1/2(6) = 3
Δt= kenaikan air
Δt = volume 2 bola / luas alas tabung
Δt = 2(4/3)(π)(rb³) / (π rtab²)
Δt = 8/3(3³) / (6²) = 72/36 = 2 cm
tinggi air dalam tabung sekarang = t1 + Δt= 25+2 = 27 cm