2. 外语
  3. A particular rocket car can travel for sustained periods at a maximum speed of 240 miles per hour. How many minutes would it tak

A particular rocket car can travel for sustained periods at a maximum speed of 240 miles per hour. How many minutes would it tak

admin2011-02-20  58
问题 A particular rocket car can travel for sustained periods at a maximum speed of 240 miles per hour. How many minutes would it take this rocket car to travel 86 miles?
选项 A、2.8
B、18 1/2
C、21 1/2
D、22
E、24
答案C
解析 A car traveling at 240 mph will cover 240760 = 4 miles every minute. 86 miles divided by 4 miles per minute=21 1/2 minutes.
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