Question

Note: this is ratio math.If a movie is played at the rate preferred by its director, a moviegoer sees 600 frames in 12.5 seconds. How many frames does a moviegoer see in 189 seconds?The movie goer will see ... frames in 189 seconds

Answer 1

It is given that a moviegoer sees 600 frames in 12.5 seconds.

Let N be the number of frames and t be the time taken to see n frames.

So, when N=600, t=12.5.

The number of frames seen per second is,

$n=\frac{N}{t}=\frac{600}{12.5}=48$

Now, we have to find the number of frames seen in t=189 s.

If n=48 frames are seen per second, then the number of frames seen in t=189 s is,

$\begin{gathered} N=n\times t \\ =48\times189 \\ =9072 \end{gathered}$

Therefore, the a moviegoer sees 9072 frames in 189 seconds.