Answer:
75 minutes or 1 hour and 15 minutes.
Explanation:
First, we need to figure out what 1/4 of an hour is. If an hour is 60 minutes, 60/4 is 15. So we know it will take 15 minutes to complete 1/5 of the worksheet. All we have to do now is multiply 15 by 5 and get 75 OR 1 hour and 15 minutes.