100 kilometre track A train travels the first 30 km at uniform speed of 30 kilometre per hour how fast much that train travel the next 70 kilometre so as to average 40 kilometre per hour for the entire
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Step-by-step explanation:
The time taken to travel 30 km (D1) is 30 km/hr. The average speed to travel the whole 100 km is average 40km/hr
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