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456 x 3,14 = 2 x 3,14 x r x t
228 = r x t
228 = a x 2a
228 = 2a^2
114 = a^2
a = V114
jadi r = V114
t = 2V114
volume tabung = 3,14 x r x r x t
= 3,14 x V114 x V114 x 2V114
= 3,14 x 114 x 2V114
= 7644 cm3