If V1 is the jet velocity and V0 is the vehicle velocity, then the propulsive efficiency of a rocket is given by

Answer: Option A

If V₁ is the jet velocity and V₀ is the vehicle velocity, then the propulsive efficiency of a rocket is given by $$\frac{2\left(\frac{{\text{V}}_0}{{\text{V}}_1}\right)}{1+{\left(\frac{{\text{V}}_0}{{\text{V}}_1}\right)}^2}$$