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luas sisi limas = 4 x luas Δ
= 4 x ( 1/2 x alas x rusuk tegak)
384 = 4 x ( 1/2 x 12 x rusuk tegak)
384 = 24 x rusuk tegak
rusuk tegak = 384 / 24
= 32
ntuk cari tinngi limas, pake pitagoras
tinggi = √(32² - 6²)
= 31,4
volume limas = 1/3 x luas alas x tinggi
= 1/3 x 12 x 12 x 31,4
= 1507,2