Answer:
0.278m/s (3sf) OR 0.28m/s (2dp)
Step-by-step explanation:
1km = 1000m
1h = 3600s (60mins x 60 secs)
1000m/3600s (simplify)
10m/36s (simplify by dividing both sides by 36)
(1/36)m/s OR 0.27777777777ms/s
Round up:
0.28m/s (2dp) or 0.278m/s (3sf)