Bill spends two days driving from point a to point b . on the first day, he drove 2 hours longer and at an average speed 5 miles per hour faster than he drove on the second day. if during the two days he drove a total of 680 miles over the course of 18 hours, what was his average speed on the second day, in miles per hour?
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Bill spends two days driving from point a to point b . on the first day, he drove 2 hours longer and...
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