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14,130=3,14×15²×t
14,130=706,5t
t=14.130/706,5
t=20 dm
jd tinggi tabung 20dm
V tabung = phi x r x r x t
14.130 dm3= 3,14 x 15dm x 15dm x t
14.130 dm3= 706,5 dm2 x t
t = 14.130 dm3 / 706,5 dm2
t = 20 dm