If each frame of a motion picture film is 35 cm high, and 24 frames go by in a second, estimate how many frames are needed to show a two hour long movie.
A) 1400
B) 25000
C) 50000
D) 170000
E) This cannot be determined without knowing how many reels were used.

Question

Quizplus · Accepted Answer

To show a two-hour long movie, we first need to convert two hours to seconds.

1 hour = 60 minutes 
2 hours = 120 minutes

1 minute = 60 seconds 
120 minutes = 7200 seconds

Now we know that the movie is 7200 seconds long, and there are 24 frames per second.

Therefore, the total number of frames in the movie = 7200 x 24 = 172800

However, the question is asking for an estimate, so we can round this to the nearest ten thousand to get 170000. Therefore, option D is the best choice.

If Each Frame of a Motion Picture Film Is 35