Question
Two trains ‘G’ and ‘H’ of equal lengths are running on parallel tracks at speeds of 30 m/s and 90 m/s, respectively. If they can cross each other in ‘w’ seconds while traveling in opposite directions to each other and take 45 seconds to cross each other while traveling in the same direction, then find the value of ‘w’.
Also, 
Let the length of train ‘G’ and ‘H’ be ‘g’ metres and ‘h’ metres, respectively. According to the question: 
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