查人人中国名人网破镜重圆 errgy百度云:Math!!!Math~~~~
来源：百度文库 编辑：查人人中国名人网 时间：2024/05/17 00:42:41
It took Sam 200 minutes to complete the difficult Sunday Times crossword puzzle. Stanley did the same puzzels in 160 minutes. By what frraction of an hour was Sam's time longer than Stanley?
(200-160)/60=40/60=2/3