(ii) the average 0. A train covers a distance of 670 km in 6 h 5 min. If it covers the first 390 km of the journey at 90 km/h, find its speed for the rest of the journey.
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Step-by-step explanation:
Time taken to cover 390km is 90km/h390km=4h20min
Remaining distance =670−390=280km
Remaining time =6h5min−4h20min=45min=0.75h
Speed =0.75280=364kmph
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