lheiannie07 wrote:If a certain animated short film consists of a total of 21,600 frames on film, how many minutes will it take to run the film?
(1) The film runs uninterrupted at a rate of 36 frames per second.
(2) It takes 5 times as long to run the film as it takes to rewind the film, and it takes a total of 12 minutes to do both.
Statement 1:
Number of seconds to run the film = (total number of frames)/(frames per second) = 21600/36.
Since the number of seconds can be calculated, so can the number of minutes.
SUFFICIENT.
Statement 2:
Let r = time to run the film and and s = the time to rewind the film.
Since it takes 5 times as long to run the film as it takes to rewind the film, we get:
r = 5s.
Since it takes a total of 12 minutes to do both, we get:
r+s = 12.
Since we have two variables (r and s) and two distinct linear equations (r=5s and r+s=12), we can solve for the two variables, with the result that the time to run the film can be determined.
SUFFICIENT.
The correct answer is
D.
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