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                                                                      EXHIBIT 11

                                  GenCorp Inc.
                    COMPUTATION OF EARNINGS PER COMMON SHARE



                                                                       Unaudited
                                                                   Three Months Ended      
                                                              -----------------------------
                                                                       February 28,
                                                                 1995               1994    
                                                              ----------         ----------
                                                                          
Earnings (Dollars in Millions)                               
- --------                                                     
                                                             
Income (Loss) Before Accounting Changes                         $   7.0            $  (3.3)
                                                             
Cumulative Effect of Accounting Changes                               -             (212.7)
                                                                -------            ------- 
                                                             
Net Income (Loss) for Primary                                
   Earnings Per Share                                               7.0             (216.0)
                                                             
Tax Affected Interest Expense                                
   Applicable to 8% Convertible                                                           
   Subordinated Debentures                                          1.4                1.4
                                                                -------            -------

Net Income (Loss) for Fully Diluted                          
   Earnings Per Share                                           $   8.4            $(214.6)
                                                                =======            ======= 
                                                             
                                                             
Shares (In Thousands)                                        
- ------                                                       
                                                             
Weighted Average Number of                                   
   Common Shares Outstanding                                 
   for Primary Earnings Per Share                                32,259             31,730
                                                             
Assuming Conversion of 8%                                    
   Convertible Subordinated                                  
   Debentures                                                     7,158              7,158
                                                                -------            -------
                                                             
Weighted Average Number of                                   
   Common Shares Outstanding                                 
   for Fully Diluted Earnings Per Share                          39,417             38,888
                                                                =======            =======
                                                             
                                                             
Earnings Per Share                                           
- ------------------                                           
                                                             
Income (Loss) Before Accounting Changes                         $   .22            $  (.10)
                                                             
Cumulative Effect of Accounting Changes                               -              (6.71)
                                                                -------            ------- 
                                                             
Net Income (Loss) for Primary Earnings                       
   Per Share                                                    $   .22            $ (6.81)
                                                                =======            ======= 
                                                             
Fully Diluted Earnings Per Share                                $   .21            $ (6.81)
                                                                =======            =======