Motorcyclist 8671

The motorcyclist was riding:

a) the first half of the driving time at a speed of 30 km/h, the second half of the time at a speed of 60 km/h,
b) the track's first half at a speed of 30 km/h and the second half at a speed of 60 km/h.

Determine its average speed.

Correct answer:

v1 =  40 km/h
v2 =  40 km/h

Step-by-step explanation:

v1 =  s/2/30 + s/2/60s v1=1/30+1/602=40 km/h
v2=1/60+1/302=40 km/h

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