Answer:
Step-by-step explanation:
1 hour = 60 minutes
1 kilometers = 1000m
9 kilometers = 9*1000 = 9000 m
Distance traveled in 60 minutes = 9000 m
Distance traveled in 1 minute = 9000/60
Distance traveled in 30 minutes
[tex]=\frac{9000}{60}*30\\\\=\frac{9000}{2}\\\\[/tex]
= 4500m = 4.5 km
