Walt ran 5 kilometers in 25 minutes, going eastward. what was his average velocity?

Velocity (v) is a vector quantity that includes the magnitude and the direction. The magnitude of the quantity is the quotient obtained in dividing the distance (d)  by the time (t). 
 
                                 v  = d / t

Substituting the known values, 
                  v = (5 km) / (25 minutes)  = (5000 m) / (1500 s) =3.33 m/s 

Therefore, Walt's velocity is 3.33 m/s due east.