作者monemo13 (李孟李孟)
看板Math
标题[微积] 应用题
时间Mon Jan 24 22:46:25 2011
题目如下：
A 100/3 -rpm stero record has a spiral groove starting 6 inches from
the center and ending 3 inches from the center. If it took 18 minutes
to play the record, approximately how long is the spiral groove?
其实我不太了解题目的意思，如果有高手可以解释一下更好！
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