alleryStart learning →A train runs half of its travel time at 40 km/h and the other half at 60 km/h. What is its average speed?
A52 km/h
B50 km/h
C48 km/h
D55 km/h
Answer & Solution
Correct answer: B. 50 km/h
With equal times the average speed is the plain mean (40 + 60)/2 = 50 km/h.
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