本题目来源于试卷: 2011 美国F=ma物理竞赛 F=ma physics competition，类别为 美国物理杯赛(Physics Bowl)
[单选题]
A cyclist travels at a ht+uet ;n -8:sk/ jdvt d/s df*oa ef5eg;q1g2constant speed of $22.0 \mathrm{~km} / \mathrm{hr}$ except for a 20 minute stop. The cyclists average speed was $17.5 \mathrm{~km} / \mathrm{hr}$. How far did the cyclist travel?
A. $28.5 \mathrm{~km}$
B. $30.3 \mathrm{~km}$
C. $31.2 \mathrm{~km}$
D. $36.5 \mathrm{~km}$
E. $38.9 \mathrm{~km}$
参考答案: A
本题详细解析:
暂无
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