What is the average speed of the car, where half of the distance covered passed at speed 66 km/h and the other half at 86 km/h.

Correct result:

v =  74.68 km/h


t=s2v1+s2v2  v=st=ss2v1+s2v2  v=2v1v2v1+v2 v=2668666+86=74.68 km/h

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