Average speed

The car drove from city A to city B at 40 km/h and back to city A at a speed of 80 km/h. What was the average speed of the car?

Correct answer:

v =  53.3333 km/h

Step-by-step explanation:

v1=40 km/h v2=80 km/h  v = s/t v =  s/v1 + s/v22 s  v=1/v1+1/v22=1/40+1/802=3160 km/h=53.3333 km/h

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