广州市天河区2016届九年级上期末数学试卷含答案解析  
13．已知圆锥的侧面积等于60πcm2，母线长10cm，则圆锥的底面半径是　6　．                 
【考点】圆锥的计算．                                                                        
【分析】圆锥的侧面积=π×底面半径×母线长，把相应数值代入即可求解．                     
【解答】解：设底面半径为r，则                                                             
60π=πr×10，                                                                                       
解得r=6cm．                                                                                      
故答案为：6．                                                                                    
【点评】本题考查了圆锥的计算：圆锥的侧面展开图为一扇形，这个扇形的弧长等于圆锥底面的周长，扇形的半径等于圆锥的母线长．