A train covers the first half of the distance between two stations at a speed of 40 km/h and the other half at 60 km/h Then its average speed is:

Question:A train covers the first half of the distance between two stations at a speed of 40 km/h and the other half at 60 km/h Then its average speed is:

1.52 km

2.50 km

3.48 km

4.100 km


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