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                                    9.Two trains A and B each of length 100m are running on parallel tracks. One overtakes other in 20 secand one crosses the other in 10 sec. Calculate the velocities of each train? | 
                            
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Answerยป  Let u and v be the velocity of two trains A and B. While overtaking the relative velocity of train A w.r.t B = u -v. ummmah thanks ๐๐n casual reply  | 
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