<PRE><B>Question 79268</B>
Jo read 50 pages of a novel in 4 hours.
At the same rate, how long would it take Jo to read 400 pages?

The formula is:

Number of pages read in 1st situation    Number of pages read in 2nd situation
------------------------------------- = --------------------------------------
 Time to read pages in 1st situation      Time to read pages in 2nd situation

Plug in:

                            50 pages     400 pages
                           ---------- = -----------
                             4 hours       x hours

Erase the words: 

                                  50      400 
                                 ---- = -----
                                   4       x

Cross multiply:

                                  50x = 1600

                                    x = 1600/50

                                    x = 32

Answer: it would take Jo 32 hours to read 400 pages. 
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