Argyle can read 7 pages of his book in 5 minutes. At this rate, how many pages can he read in 2 hours?

There are 60 minutes in one hour, so in two hours there are 120 minutes.

Every five minutes he can read 7 pages. There are 24 five-minute increments in 2 hours(120 minutes).

$${\mathtt{24}}{\mathtt{\,\times\,}}{\mathtt{7}} = {\mathtt{168}}$$

Or from the beginning:

$${\frac{{\mathtt{2}}{\mathtt{\,\times\,}}{\mathtt{60}}{\mathtt{\,\times\,}}{\mathtt{7}}}{{\mathtt{5}}}} = {\mathtt{168}}$$

There are two hours = 120 minutes

It takes 5 minutes to ready 7 pages

 

120/5 = 24 (5 minute time intivals)

24 x 7 = 168 pages read.