A person 'A' is standing in the middle of a platform of length 300 m. Two trains 'B' and 'C' of respective lengths 120 m and 250 m running with respective speeds of 54 km/h and 72 km/h enter the platform from opposite ends at the same time (on parallel tracks). How much of the length of train 'C' does the person see while it passes him if train B comes in between him and train C to block his view?