Alex can read 8 pages in 20 minutes. How long will it take him to read 20 pages?
20 / 8 = 4 * 5 / ( 4 * 2 ) = 5 / 2 = 2.5 min / page
2.5 * 20 = 50 min
OR
8 / 20 = 20 / x Multiply both sides by x
8 * x / 20 = 20 * x / x
8 x / 20 = 20 Multiply both sides by 20
8 x * 20 / 20 = 20 * 20
8 x = 400 Divide both sides by 8
8 x / 8 = 400 / 8
x = 50 min
To find out how long it will take Alex to read 20 pages, we can set up a proportion using the given information.
First, let's determine the rate at which Alex reads. We know that he can read 8 pages in 20 minutes. So, his reading rate is 8 pages per 20 minutes, which can be simplified to 2 pages per 5 minutes.
Now, we can set up a proportion. Let "x" represent the time it takes Alex to read 20 pages.
8 pages / 20 minutes = 20 pages / x minutes
To solve this proportion, we can cross-multiply:
8x = 20 * 20
Simplifying the right side:
8x = 400
Dividing both sides by 8:
x = 400 / 8
x = 50
Therefore, it will take Alex 50 minutes to read 20 pages.