A certain clock makes every hour by stricking a number of times equel to the hour and the time required for a strock 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 22seconds. At 12:00, how many seconds elapse between the beginning of the first stroke and the end of the last stroke. The correct answer is 46. But how to get it? Could anyone help me?[em27]作者: tongxun 时间: 2003-1-22 22:08
