Mathematics, 18.12.2019 22:31, kashmoney8690

Afreight train made a trip to a repair. on the trip there it travelers 25 mph and on the return trip it went 20 mph. how long did there take if the return trip took 15 hours?

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Afreight train made a trip to a repair. on the trip there it travelers 25 mph and on the return trip...

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