Bantuin om/bang/tante/bro/sis Pake caranya biar ane paham

Volume balok = pxlxt = 20x9x7 = 1.260 cm3
volume prisma segitiga = Luas Segitiga x tinggi = (1/2(axt)) x 20 = (1/2(16x9)) x 20 = 1.440cm3

volume seluruhnya = V. balok + V. prisma segitiga = 1.260 cm3 + 1.440 cm3 = 2.700 cm3

Jawabannya  : B