first we miltiply by the number of seconds on a hour(3600) to change the unitis to hours
[tex]\begin{gathered} 55.523\times3600 \\ =199882.8 \end{gathered}[/tex]so the velocity is 199882.8 meters/hour
now transform the meters on kilometers dividing between 1000
[tex]\frac{199882.8}{1000}=199.8828[/tex]the new velocity is 199.8828 kilometers/hour