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When a driver got on the expressway, she set the cruise control at 55 miles per hour for the first 2 hours and at 65 miles per hour for the remaining 2.2 hours of the trip. When she returned, she traveled the same distance along the expressway and averaged 50 miles per hour for the return trip. How many more minutes was she on the expressway returning than going?
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· 相关考点
2.5.3 时速与距离问题
2.5.3 时速与距离问题
以上解析由 考满分老师提供。
