Jawabanmu

2014-05-21T08:37:09+07:00
Volume balok = p  x l x t = 15 x 8 x 12 = 1440
volume limas = 1/3 x p x l x t = 1/3 x 15 x 8 x 20 = 800

jadi volume gabungan nya 2.240
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