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A plane 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
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A plane 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?

User Vanpersil
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Average speed is 570 miles per hour
A plane traveling from Dallas to New York with a tailwind of 30 miles per hour takes-example-1
User Gregkerzhner
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