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(2003•辽宁)已知圆锥的侧面展开图的面积是15πcm2,母线长是5cm,则圆...
(2003•辽宁)已知圆锥的侧面展开图的面积是15πcm
2,母线长是5cm,则圆锥的底面半径为( )
A.
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cm
B.3cm
C.4cm
D.6cm
考点分析:
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