A train covers the 5 km of its journey at a speed of 30 km/h

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M: +1.00/-0.33

A train covers the 5 km of its journey at a speed of 30 km/hour and next 15 km at a speed of 45 km/hour. The average speed of the train was

[UKPSC 2012 GS P1]

35 km/hour

40 km/hour

32 km/hour

42 km/hour