五妙水仙膏价格:math!math!!!!!!

来源:百度文库 编辑:中科新闻网 时间:2024/06/29 23:55:57
A clock gains 20 minutes each day. If the correct time is indicated now, in how many days will it again show the first correct time?

如果那个钟是12小时制的,
那么:就是12*60/20 = 36 天

如果是24小时制的,
那么:就是24*60/20 = 72 天