Answer:
Step-by-step explanation:
1)Solution,
Distance(s)=30m
Time taken(t)=11s
Now,
Average velocity=s/t=30m/11s=2.72m/s
2)Solution,
Distance(s)=20km=20x1000m=20000m
Time(t)=9:30-8:30=1:30=60+30 min=90min=90x60=5400s
Now,
Average velocity=s/t=20000m/5400s=3.7m/s