[求助]MATH D.S.

yahoo750

At 9 A.m. a hiker was due south of point P, what direction was point P from her position at noon?(1)from 9 A.M. util11 A.M. She walked due east at 2 miles per hour, and from 11A,M, until noon, she walked due north at 3 miles per hour(2)at noon, she is exactly 4.5 miles from point P
I've chosen A as an answer, but the standard anwser is E. I dont't know why? Could anyone help me?[em08][em08]

孤注一掷

我的思路是:
题目并没有告诉她的起点离P有多远,所以即使有(1)和(2)给的条件,也无法确认最后她跟P的位置关系.
因此E是正确答案.

yahoo750

Thank you so much! Yes, you're right.