设:路程为S
已知:v1=15km/H v2 20km/h V1-V2=10MIN=1/6km
求:S
S/v1-S/v2=10/60
S/15-S/20=1/6
4S/60-3S/60=1/6
S/60=1/6
S =1/6/1/60
S=1/6*60
S=10
答:A,B相聚10KM
设:路程为S
已知:v1=15km/H v2 20km/h V1-V2=10MIN=1/6km
求:S
S/v1-S/v2=10/60
S/15-S/20=1/6
4S/60-3S/60=1/6
S/60=1/6
S =1/6/1/60
S=1/6*60
S=10
答:A,B相聚10KM