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Mathematics, 17.09.2019 22:30 lukeritsema88

Aplane traveling from dallas to new york with a tailwind of 30 miles per hour takes 4.5 hours. returning with the headwind, it takes the same plane 5 hours. what is the average speed of the plane in calm conditions?

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Aplane traveling from dallas to new york with a tailwind of 30 miles per hour takes 4.5 hours. retur...
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