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Dik
rho = 1800 kg/m³
V = 36 m³
g = 9,8 m/s2
Fa = rho × g × v
Fa = 1800 × 9,8 × 36
Fa = 635040 N
Karena Fa lebih besar dari berat kayu ( 442000 ), maka jawabannya A