A train covers at distance of 670 km in 6h 5min. If it covers the first 390 km of the journey at 90 kilometres per hour. Find its speed for the rest journey
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Answer:
160 km/h
Step-by-step explanation:
Total time taken = 6h 5m = 73/12 h
Time taken for 1st 390 kms = 390/90 = 13/3 h
Time taken for rest 280 kms = 73/12 - 13/3 = 7/4 h
Speed for rest 280 kms = 280×4/7 = 160 km/h
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