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tinggi = 2/3 * 324
= 216 cm atau 6³ cm
a x t = 18 x 2 = 36
b = bagian
a : t = 3b : 2b
3b x 2b = 36
6b = 36
b = 36/6
1 bagian = 6
t = 2 bagian = 2 x 6 = 12