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Train 'P' starts its journey from a point at 6:00 pm, traveling at an average speed of 48 km/h. Train 'Q' departs from the same point towards Train 'P' two hours later at an average speed of 60 km/h. After traveling for 't' hours, Train 'Q's average speed reduces by 10% due to fog. If Train 'Q' and Train 'P' meet at 8:00 am, calculate the value of 't'.

A 4

B 6

C 3

D 9

E none of these

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