Answer;
= 29,898.4375 Kg
Explanation;
Volume of a prism is given by the formula;
V = base area × height
= 1.25 m × 1.25 m × 2.15 m
= 3.359375 m³
Density = 8.9 g/cm³
This is equivalent to ; 8900 kg/m³
Therefore;
Mass = Density × volume
= 8900 kg/m³ × 3.359375 m³
= 29,898.4375 Kg