Tom can type 90 words a minute.  A page is 450 words.  How long would it take him to type out 10 pages?
How long does it take Tom to type a page? ** He can type out 1 page in 450/90=<<450/90=5>>5 minutes
How long would it take Tom to type 10 pages? ** So it would take 5*10=<<5*10=50>>50 minutes
#### 50