一道简单的数学题,答对了再加30分!已知 甲圆的半径长等于乙圆的直径长,且它们的面积之和是100平方厘米,那么甲圆的面积是多少?2、一块圆形草坪的周长是50.24米,这块草坪占地多少平方米?(
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![一道简单的数学题,答对了再加30分!已知 甲圆的半径长等于乙圆的直径长,且它们的面积之和是100平方厘米,那么甲圆的面积是多少?2、一块圆形草坪的周长是50.24米,这块草坪占地多少平方米?(](/uploads/image/z/12549938-50-8.jpg?t=%E4%B8%80%E9%81%93%E7%AE%80%E5%8D%95%E7%9A%84%E6%95%B0%E5%AD%A6%E9%A2%98%2C%E7%AD%94%E5%AF%B9%E4%BA%86%E5%86%8D%E5%8A%A030%E5%88%86%21%E5%B7%B2%E7%9F%A5+%E7%94%B2%E5%9C%86%E7%9A%84%E5%8D%8A%E5%BE%84%E9%95%BF%E7%AD%89%E4%BA%8E%E4%B9%99%E5%9C%86%E7%9A%84%E7%9B%B4%E5%BE%84%E9%95%BF%2C%E4%B8%94%E5%AE%83%E4%BB%AC%E7%9A%84%E9%9D%A2%E7%A7%AF%E4%B9%8B%E5%92%8C%E6%98%AF100%E5%B9%B3%E6%96%B9%E5%8E%98%E7%B1%B3%2C%E9%82%A3%E4%B9%88%E7%94%B2%E5%9C%86%E7%9A%84%E9%9D%A2%E7%A7%AF%E6%98%AF%E5%A4%9A%E5%B0%91%3F2%E3%80%81%E4%B8%80%E5%9D%97%E5%9C%86%E5%BD%A2%E8%8D%89%E5%9D%AA%E7%9A%84%E5%91%A8%E9%95%BF%E6%98%AF50.24%E7%B1%B3%2C%E8%BF%99%E5%9D%97%E8%8D%89%E5%9D%AA%E5%8D%A0%E5%9C%B0%E5%A4%9A%E5%B0%91%E5%B9%B3%E6%96%B9%E7%B1%B3%3F%EF%BC%88)
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