Given:- Escape velocity \(=u\)

The initial velocity of projective is \(200 \%\) more than the escape velocity

\(\Rightarrow V_{\text {initial }}=u+2 u=3 u\)

To find:- The speed of partich in interstellar space

\(\Rightarrow\) when gravitational. potential evergy is \(0\)

Applying Law of Cousavation of energy:,

\(\frac{1}{2} m V_{\text {initial }}^2+(P \cdot E)_{\text {initial }}=\frac{1}{2} m V_{\text {final }}^2+0\)

\(\therefore\) Velocity of the body in the intestella space \(=2 \sqrt{2} 4\)