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Verified answer
Bangun Ruang Sisi Datar.L = 2(pl + pt + lt)
306 = 2 [(5x)(2x) + (5x)(x) + (2x)(x)]
306 = 34x² → x = 3
V = plt
= (5x)(2x)(x)
= 10x³ = 10(3)³ = 270 cm³