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= 3 x 2 x 22 x 21
7
= 396cm
Jawaban ( D )
panjang tali = (3x+π) d = (3 + 22/7) . 2.21 = 6 . 21 + 44. 3 = 258
x = banyak lingkaran horisontal - 1 = 2-1 = 1
jawaban C