Answer:
5 km
Explanation:
For a uniform motion, the relationship between distance, time and speed is:
[tex]v=\frac{d}{t}[/tex]
where
d is the distancee travelled
t is the time taken
v is the average speed
In this problem,
v = 10 km/h
t = 1/2 h = 0.5 h
Therefore, the distance travelled is
[tex]d=vt=(10 km/h)(0.5 h)=5 km[/tex]