作者cline (cline)
看板GRE_Verbal
標題[討論] 請教一題數學
時間Wed May 30 03:32:29 2007
A circular flower bed of radius r feet s surrounded by a circular walk of
width r/2 feet.
columnA columnB
the area of the flower bed the area of the walk
題目看不太懂，尤其是walk是什麼意思，謝謝！！
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