Answer
$V = 5.102~m^3$
Work Step by Step
The buoyant force on the dinosaur model is equal to the weight of the water displaced by the model's volume.
The mass of the displaced water is $0.63776~kg$
We can find the volume of the displaced water:
$V = \frac{mass}{\rho}$
$V = \frac{0.63776~kg}{1000~kg/m^3}$
$V = 6.3776\times 10^{-4}~m^3$
The volume of the model is $~~6.3776\times 10^{-4}~m^3$
We can find the volume of the actual T. rex:
$V = (6.3776\times 10^{-4}~m^3)(20)^3$
$V = 5.102~m^3$
