on a 120 km long railway track a train travels first 30 km at a speed of 30 km /h how fast must train travels the remaining distance so as to average 40 km for the entire tip
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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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45 will be the answer of this question
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