Uphill and downhill

The cyclist moves uphill at a constant speed of v1 = 10 km/h. When he reaches the top of the hill, he turns and passes the same track downhill at a speed of v2 = 40 km/h. What is the average speed of a cyclist?

Result

v =  16 km/h

Solution:

Solution in text v =
Solution in text v = : Nr. 1







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