A certain clock marks every hour by striking a number of times equal to the hour, and the time required for a stroke is exactly equal to the time interval between strokes. At 6:00 the time lapse between the beginning of the first stroke and the end of the last stroke is 22 seconds.At 12:00 how many seconds elapse between the beginning of the first stroke and the end of the last stroke???
救命 為啥簡單的題目 我卻做不出來 感覺答案有問題???