Jawabanmu

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2014-05-06T08:23:23+07:00
V=La x tprisma
  =[(jumlah sisi sejajar).t/2] x tprisma
  =[(18+30)8/2] x 20
  =[(48)8/2] x 20
  =192x20
  =3840cm3
1 5 1
2014-05-06T08:25:38+07:00
Volume = luas alas x tinggi
V = ((a+b x t) : 2 )  x  t = (48 x 8 : 2 ) x 20 = 3840