a train travels the first 30 km of 120 km track with a uniform speed 30 km/hr what shold be the speed of train to cover the remaining distance of the tack so that its avg speed is 60km/hr for the entire trip [ v=90km/hr]
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On a 120 km track, a train travels the first 30 km with a uniform speed of 30 km/h. How fast must the train travel the next 90 km so as to average 60 km/h for the entire trip? A. 65 km/h.
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