Pure Reason

At the beginning of this century, long before groups and relations were in vogue, algebra itself was not well received in educational circles. There was some doubt as to its pedagogical value. Logical arguments were considered preferable to unknowns and equations. Here we have an opportunity to return to that era and rediscover the utility of “pure reason.” It takes a train 7 seconds to pass by a stationary observer and 26 seconds to traverse the length of a station 380 meters long. What is the speed of the train and its length ?

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