Did it take P more than 2 hours to walk a distance of 10 miles along a certain trail? (1mile = 1.6 kilometers) (1) P walked this distance at an average rate of less than 6.4 kilometers per hour (2) On average, it took P more than 9 minutes per kilometer to walk this distance
答案是D。。。我觉得2推不出来啊，只能说明P的速度大于5/1.2 miles per hour，但是大于的多的话就可以小于2小时，大于的少的话还是大于两小时啊
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发表于 2010-4-12 14:42:55
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