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Verified answer
Volume tabung = 3.140 cm^3tinggi = 10 cm
diameter = ..??
v tabung = L a × t = phi × r^2 ×t
3.140 = 3.14 × r^2 × 10
3.140 = 31, 4 × r^2
r^2 = 3.140 / 31.4
r^2 = 100
r = akar kuadrat dari 100 = 10 cm
jadi diameter tabung = 2 × 10 = 20 cm