1) v=s/t=36km/0.5h=72km/h
2)V=s1+s2/t1+t2=100+300/25+60=4.7m/s
3) V=s1+s2/t1+t2
s1=v1*t1=10*120=1200m
V=1200+500/30+120=11.3m/s
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1) v=s/t=36km/0.5h=72km/h
2)V=s1+s2/t1+t2=100+300/25+60=4.7m/s
3) V=s1+s2/t1+t2
s1=v1*t1=10*120=1200m
V=1200+500/30+120=11.3m/s