单选题
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?
【正确答案】
C
【答案解析】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 30×3 or 90 miles in 
, or 3 hours. Therefore, Becky traveled 
, or 3 hours. Therefore, Becky traveled