Reply to Views:公仔箱論壇0 \; ?3 D! U Y; l! }- }
Yes this is simple calculation, but you have made the first step only. You may get only half point while the question is asking about the distance, which you have simplified your first step t2 - t1 = d/v2 - d/v1 into d=???. |
發表於 2010-3-6 04:05 PM
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