A train 5

A train travels from Brno to Ass at a speed of 45 km/h and returns back at a speed of 36 km/h. Find the average speed of the train.

Correct answer:

v =  40 km/h

Step-by-step explanation:

v1=45 km/h v2=36 km/h  v =    ΣtΣs  v =  s/v1 + s/v22 s  v=1/v1+1/v22=1/45+1/362=40 km/h



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