Determine the average speed at which the motorcyclist travels from A to B ad back to A

A motorcyclist travels from A to B at 40km/hr. And from B to A at 60km/hr, and the distance between A and B is x km. (NB: average speed is not 50km/hr)
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1 Answer

go same distans, speed1=40, speed2=60

averaej speed=48

zampel, assume him go distans=100

then time1=100/40=2.5

time2=100/60=1.666666666666666

distans=200... & time= 4.1666666666666

speed=200/4.166666666=48
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