Out of 450 km, the train travels 60 km at speed of 30 km/h, 120 km at speed of 40 km/h. If average speed of train is 75 km/h then find speed of train in the end of journey.

1
270 km/h
2
290 km/h
3
250 km/h
4
220 km/h
5
None of the above

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