GMATPrep PP 01-09

[cecilia1211]

我要問的問題是最新 GMATPOWERPREP程式 裡面的問題
因為沒有og11 我不知道有沒有重複...

Did it take Pei more than 2 hours to walk a distance of 10 miles along a certain trail?(1miles=1.6kilometers,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 minuteas per kilometer to walk this distance

答案d

可是我覺得b單獨也可以成立阿......

麻煩請高手解答 謝謝....

[zazer.lin]

Did it take Pei more than 2 hours to walk a distance of 10 miles along a certain trail?(1miles=1.6kilometers,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d

statement(1)
6.4 kilometers / 1 hour = 4 miles / 1 hour = 10 miles / 2.5 hours
所以要走 10 mile 要 2.5 hours .
所以 statement(1) 成立

statement(2)
1 kilometer / 9 minutes = 16 kilometer / (16*9) minutes = 10 miles / 144 minutes
所以走 10 mile 得要 144 minutes (= 2 hours 24 minutes)
所以 statement(2) 成立

故答案(D)

cecilia1211大大您說b單獨也可以成立....那您的意思是說a不成立嗎..還是...
一點淺見...供您參考...