There are two poles on the same ground, and the heights of two poles are 10 and 12. The distance between their bottom is 6. What is the distance between the apexes of two poles?
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A$$\sqrt{5}$$
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B$$2\sqrt{5}$$
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C$$\sqrt{10}$$
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D$$\sqrt{15}$$
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E$$2\sqrt{10}$$
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正确答案: E