Answer
13.64 miles per hour
Work Step by Step
20 feet per second
60*20 feet per 60 seconds
1200 feet per minute
1200*60 feet per 60 minutes
72000 feet per hour
72000/5280 miles per hour
13.636 miles per hour
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.