The input is two speeds (for the trip and return trip) and output is average speed. Assume units are consistent, say miles per hour (MPH).

So, for example, a train travels at 60 MPH on a trip and at 100 MPH on return trip. What was its average speed for the entire trip?

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Last Solution submitted on Dec 04, 2025

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Boldizsar Riccardo G. Armando Longobardi Vasilis Bellos

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