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A train travels at a certain average speed for a distance of \(63 \ km\) and then travels a distance of \(72 \ km\) at an average speed of \(6 \ km/h\) more than its original speed. If it takes \(3\) hours to complete the total journey, what is its original average speed?
Answer:
The original average speed of the train is \(km/h\).
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