英语智力题a hare and a tortoise are racing.Theya hare and a tortoise are racing.They should cover a distance of 2,000m.the tortoise walks at a speed of 25 m per minute,while the hare can run at a speed of 325 m per minute.But the hare thinks he runs much faster than the tortoise,and he has a sleep during the way to the end.As a result,when the tortoise arrives the hare may have 400 m to go.Question:How many minutes does hare sleep?
问题描述：
英语智力题a hare and a tortoise are racing.They
a hare and a tortoise are racing.They should cover a distance of 2,000m.the tortoise walks at a speed of 25 m per minute,while the hare can run at a speed of 325 m per minute.But the hare thinks he runs much faster than the tortoise,and he has a sleep during the way to the end.As a result,when the tortoise arrives the hare may have 400 m to go.Question:How many minutes does hare sleep?
答
翻译：龟兔赛跑，赛程2000m。乌龟每分钟跑25m，兔子每分钟跑325m。但是，兔子自大，途中睡了一觉。最终，当乌龟到达终点时兔子离终点还有400m。问题：兔子睡了多长时间？
答：
乌龟用时：2000/25=80分钟
兔子跑步用时（2000-400）/325=64/13
睡觉用时 80-64/13=976/13=75.0769........分
答
2000/25-(2000-400)/325≈75minutes