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分數與面積一題（急）

Nov 27th 2013, 13:17

在地球表面上，北半球的海洋面積佔整個北半球表面的3／5

南半球的海洋面積佔整個南半球的3／16

假設南北半球的地球表面積相等，則北半球陸地面積佔整個地球陸地面積的幾分之幾？

請解釋、謝謝

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