does it have extra information or missing information

I would say it has extra information. All you need to really know is that she's going to type 500 words. The info about writing the essay in 5 hours and how many pages is not needed. To solve, I would divide 500 by 60, which is 8.3 repeating, or just 8.3, so it'd take 8.3 minutes to type it up. Please correct me if I'm wrong!