Physics, asked by stillstudio3, 10 months ago

On a 100 km track, a train travels the first 30 km at a uniform speed of 30 km/h. How fast must the train travel the next 70 km so as to average 40 km/h for the entire trip? [CBSE 2011]

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Answered by abhi352000

4

Answer: 140/3 km/hr

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