一个花坛,直径是5米,在它周围有一个宽0.5米的环形鹅卵石小路,小路面积是多少平方米?(要算式)帮我、
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![一个花坛,直径是5米,在它周围有一个宽0.5米的环形鹅卵石小路,小路面积是多少平方米?(要算式)帮我、](/uploads/image/z/7803832-40-2.jpg?t=%E4%B8%80%E4%B8%AA%E8%8A%B1%E5%9D%9B%2C%E7%9B%B4%E5%BE%84%E6%98%AF5%E7%B1%B3%2C%E5%9C%A8%E5%AE%83%E5%91%A8%E5%9B%B4%E6%9C%89%E4%B8%80%E4%B8%AA%E5%AE%BD0.5%E7%B1%B3%E7%9A%84%E7%8E%AF%E5%BD%A2%E9%B9%85%E5%8D%B5%E7%9F%B3%E5%B0%8F%E8%B7%AF%2C%E5%B0%8F%E8%B7%AF%E9%9D%A2%E7%A7%AF%E6%98%AF%E5%A4%9A%E5%B0%91%E5%B9%B3%E6%96%B9%E7%B1%B3%3F%EF%BC%88%E8%A6%81%E7%AE%97%E5%BC%8F%EF%BC%89%E5%B8%AE%E6%88%91%E3%80%81)
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