DEVORIA2001
16.10.2019 •
Mathematics
If you bike for 60 kilometers at 30 kilometers per hour and return at 20 kilometers per hour, what is the average speed for the whole trip.
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Ответ:
v2=20km/hr
v=2v1v2/(v1+v2)
=2*30*20/(30+20)
=24km/hr
Ответ: