Question 1092906
 If Irma is 100 miles ahead of Jose and they are walking the same path; and Irma is going 14 MPH while Jose is going 18 MPH.
 How long will it take Jose reach Irma?
:
The relative speed between the two is 4 mph, therefore the question is 
How long will it take to travel 100 mi at 4 mph
100/4 = 25 hrs