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385.000 = 22/7×35×35×t
385.000 = 3.850×t
t = 385.000÷3.850
t = 100 cm
385.000 cc = 1 × 385.000 cm³ = 385.000 cm³
jari - jari = 70/2 = 35
Volume tabung = πr²×tinggi
385.000 cm³ = 22/7 × 35 × 35 × t
385.000 cm³ = 22×5×35×t
385.000 cm³ = 3850t
= t
100 = t
Tinggi drum itu 100 cm