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Verified answer
P = 15 cml = 10 cm
t balok = 8 cm
t limas = (14 - 8) cm = 6 cm
volume
= volume balok + volume limas
= (p × l × t balok) + (1/3 × p × l × t limas)
= ( 15 × 10 × 8) cm³ + (1/3 × 15 × 10 × 6) cm³
= 1200 cm³ + 300 cm³
= 1500 cm³ (B)