25) D

Let us calculate the difference between beginning of first film and ending of last film.
Beginning of first film = 10:15
Ending of last film = 22:45
Difference = 12 hours 30 minutes.

Number of films = 3+3 = 6 films
Time taken to finish one set = 12 hours 30 minutes
Total time for 6 movies = 2 x (117+109+119) = 690 minutes = 11 hours 30 minutes.
Total interval between first three films = 12hours30mins – 11hours30mins = 60 minutes
Now, this is where this gets a bit tricky. 6 films does not mean that there will be 6 breaks.

Here is what will happen:
Movie – Break – Movie – Break – Movie – Break – Movie – Break– Movie  – Break – Movie
In total, there will be 5 breaks. 60 minutes distributed in 5 breaks = 12 minutes per break.

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