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若圆锥的侧面积为15π,底面半径为3,则圆锥的母线长为( ) A.2.5 B.5...
若圆锥的侧面积为15π,底面半径为3,则圆锥的母线长为( )
A.2.5
B.5
C.5π
D.10π
考点分析:
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