[求助]prep-ds1-155

155.
                15462-!-item-!-187;#058&010358

Did it take Pei more than 2 hours to walk a distance of 10 miles along a certain trail?  (1 mile = 1.6 kilometers, rounded to the nearest tenth.)

(1)  Pei walked this distance at an average rate of less than 6.4 kilometers per hour.

(2)  On average, it took Pei more than 9 minutes per kilometer to walk this distance.

 答案是D

但我认为是A  因为（2）中说more than 说明Pei所需的时间是<10*1.6*9/60=2.4hours  不能判断 所需时间是不是大于2hours啦~~~

不知道是我哪里错了  求救NN

Dear,（2）中说more than 说明Pei所需的时间是>10*1.6*9/60=2.4hours  不能判断 所需时间是大于2hours啦~~~

(*^__^*) 嘻嘻……要仔细哦