Chemistry
Chemistry, 22.06.2019 03:00, litttyyyu33411

Atrain travels 74 kilometers in 3 hours, and then 81 kilometers in 5 hours. what is its average speed?

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Chemistry, 22.06.2019 00:30, portedon8644
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Atrain travels 74 kilometers in 3 hours, and then 81 kilometers in 5 hours. what is its average spee...

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