14
                           
                           
                              
                           
                           
                           
                           
                                                      
                           
                  
                  
                  
                           
                                                                                 
                           
                              
                                                            
                                 
                                 
                                 
                              
                           
                           
                           
                           
                           
                        
                        
                     
                              Q:
                           
                           
                                                      | A) 68 kmph | B) 52 kmph | 
| C) 76 kmph | D) 50 kmph | 
                              Answer:   A) 68 kmph
                              
                                                            
                              
Explanation:
                               
                           
                           Explanation:
Let the speed of the faster train be 'X' kmph, 
Then their relative speed= X - 48 kmph
To cross slower train by faster train, 
Distance need to be cover = (400 + 600)m = 1 km. and 
Time required = 180 sec = 180/3600 hr = 1/20 hr.
Time = Distance/Speed 
=> 1/20 = 1/(x-48)
X = 68 kmph
                            
                                                                        Aptitude and Reasoning
                                                                        General Knowledge
                                                                        Puzzles
                                                                        Interviews
                                                                        Technical
                                                                        Certifications
 Exams
 Job
                                                                    Roles
 True or False
 Exams