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标题: 大家帮忙看一眼 [打印本页]

作者: 回家过年 时间: 2002-12-5 19:02 标题: 大家帮忙看一眼

(263) A person’s journey is to go to the office and then go back following the same route. If this person goes to the office and completes 10% of the way back, what percent of the journey has the person walked? (55%)

60？[em11][em11][em11]

作者: 猫猫头 时间: 2002-12-5 19:10

completes 10% of the way back means 10% of the single route
so it should be 10%*50%=5%
50%+5%=55%

作者: tongxun 时间: 2002-12-5 19:16

另一种相对白痴的算法：
来、回，合起来就是2；
来了，就是完成了1，回了10%，就是0.1，则总共走了1.1
1.1/2 =55%

作者: 回家过年 时间: 2002-12-5 20:10

谢谢两位

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