volume bangun adalah ...

volume bangun = vol balok + vol limas
tinggi limas = 14 - 8 = 6 cm

volume balok = 15 × 10 × 8 = 1.200 cm³

volume limas = 1/3 × luas alas × tinggi
= 1/3 × (15×10) × 6
= 1/3 × 150 × 6
= 50 × 6
= 300 cm³

vol total = 1.200 + 300 = 1.500 cm³.