GWD25-30

由 **keane0727** » 2007-04-08 23:59

Q30.
Yesterday it took a certain plane 3 hours to fly from City A to
City B at an average speed of 400 miles per hour. Today the
same plane flew from City A to City B along the same route at
an average speed of 450 miles per hour. How many more
yesterday than it took today?

A. 10
B. 15
C. 20
D. 25
E. 30

看不懂這題在問什麼？也兜不出答案
　

由 **麥香寶** » 2007-04-09 14:52

AB距離 =400 *3 = 1,200
today左花的時間 = 1,200 / 450 = 8/3 hours
題目應該是問兩天的時間差 = 3- 8/3 =1/3 hours = 20 min (C)

由 **keane0727** » 2007-04-11 01:22

麥香寶 \$m[1]:AB距離 =400 *3 = 1,200
today左花的時間 = 1,200 / 450 = 8/3 hours
題目應該是問兩天的時間差 = 3- 8/3 =1/3 hours = 20 min (C)

謝謝

由 **chris8888** » 2007-12-03 23:11

這題目有漏掉字吧? 沒有單位嗎?
Yesterday it took a certain plane 3 hours to fly from City A to
City B at an average speed of 400 miles per hour. Today the
same plane flew from City A to City B along the same route at
an average speed of 450 miles per hour. How many (minutes) more
yesterday than it took today?

A. 10
B. 15
C. 20
D. 25
E. 30

GWD25-30

GWD25-30

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