1. ## rate of work

Hi

I need help with this problem. I am suppose to do like a table for it or something to that extent but I am lost on it.

Alright here is the problem.

If 5 teachers can correct 500 exams in 30 days. How many days would it take for 20 teachers to correct 800 exams???

Any help would be appreciated

$\displaystyle ?=\frac {800*30}{2000}=\boxed{12 \text{ days}}$.