2. 外语
  3. If Jason traveled 30 miles in 6 hours and Becky traveled three times as far in half the time, what was Becky’s average speed, in

If Jason traveled 30 miles in 6 hours and Becky traveled three times as far in half the time, what was Becky’s average speed, in

admin2013-05-19  29
问题 If Jason traveled 30 miles in 6 hours and Becky traveled three times as far in half the time, what was Becky’s average speed, in miles per hour?
选项 A、5
B、15
C、30
D、45
E、90
答案C
解析 The correct answer is C. You are given that Jason traveled 30 miles in 6 hours and that Becky traveled three times as far in half the time; Becky traveled 30x3 or 90 miles in 6×, or 3 hours. Therefore, Becky traveled 90/3, or 30 miles per hour.
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