Problems 5060 do not match the examples in this text, but all the problem-solving techniques necessary to

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Problems 50–60 do not match the examples in this text, but all the problem-solving techniques necessary to answer these questions have been covered in this text. These problems are designed to test your problem-solving abilities.


A plane makes a 630-mile flight with the wind in 2.5 hours; the return flight against the wind takes 3 hours. Find the wind speed.

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