On a 120 km track,a train travels the first 30km at uniform speed of 30km/h how fast must the train travel next 90km so to average speed for entire trip is 60 km/h
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I think so this is the correct procedure
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lalithadhitya:
please explain
average speed is the sum of speed divided by 2 now we know on speed substitute the speed you get anothrr
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