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Mathematics, 07.06.2020 12:57 kaliyab191

Mary drove to Birmingham Airport at 45 miles per hour for the first two hours and then at 70 miles per hour for the remainder of the journey. Her average speed for the entire journey was 60 miles per hour. How long did Mary's journey to Birmingham Airport take?

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Mary drove to Birmingham Airport at 45 miles per hour for the first two hours and then at 70 miles p...
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