Drew has to finish his homework. He has 20 pages to read and 14 questions to answer. It takes him 10 minutes to read 4 pages. How many minutes will it take for him to read the full assignment?

Drew has to read 20 pages / 4 pages per 10 minutes = <<20/4=5>>5 sets of 10 minutes.

It will take him 5 sets x 10 minutes per set = <<5*10=50>>50 minutes to read the full assignment. Answer: \boxed{50}.

If Drew can read 4 pages in 10 minutes, then he can read 1 page in 10/4 = 2.5 minutes.

Therefore, to read 20 pages, it will take him 20 x 2.5 = <<20*2.5=50>>50 minutes.

To find out how many minutes it will take Drew to read the full assignment, we need to determine the number of minutes it takes him to read 1 page.

We're given that it takes him 10 minutes to read 4 pages. We can set up a ratio to find out how many minutes it takes him to read 1 page.

10 minutes : 4 pages = ? minutes : 1 page

To find the missing value, we can cross multiply and solve for "? minutes":

10 minutes * 1 page = 4 pages * ? minutes

10 minutes = 4? minutes

Now, we can solve for "? minutes" by dividing both sides of the equation by 4:

10 minutes ÷ 4 = 4? minutes ÷ 4

2.5 minutes = ? minutes

Therefore, it takes Drew 2.5 minutes to read 1 page.

Since Drew has 20 pages to read, we can multiply the number of pages by the time it takes to read 1 page to find the total time:

20 pages * 2.5 minutes/page = 50 minutes

Therefore, it will take Drew 50 minutes to read the full assignment.