To find the density \( D \) of the object, you can use the formula:
\[ D = \frac{m}{v} \]
Where:
- \( m \) is the mass,
- \( v \) is the volume.
Given:
- \( m = 700 , \text{kg} \)
- \( v = 649 , \text{m}^3 \)
Substituting the values into the formula:
\[ D = \frac{700 , \text{kg}}{649 , \text{m}^3} \]
Calculating this gives:
\[ D \approx 1.07898 , \text{kg/m}^3 \]
Rounding to three decimal places, the density is approximately:
\[ D \approx 1.079 , \text{kg/m}^3 \]
Thus, the correct answer is:
1.079 kg/m³.