(Answered) Suppose the speed of light were 100 mph trains on parallel

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Suppose the speed of light were 100 mph. Trains on parallel tracks are approaching each other at speeds of 92.64 mph and 87.89 mph. A person on one of the trains sees the two trains approaching each other at what speed? Answer in units of mph.

After the trains pass a crazy person on the 92.64 mph train fires a rifle with muzzle velocity 92.64 mph back at the other train. With what speed does the person on that train see the bullet approach? (A negative answer means the bullet is receding).

Answer in mph.

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