Question 314120
Use the famous formula {{{d=r*t}}}.  In this case, you have d= 100 km, and t= 4 hours.  So plug in what you know, and solve for the unknown, which in this case is rate, r.

d=rt
100=r*4
4r=100


Divide both sides by 4:
r=25


Dr. Robert J. Rapalje, Retired
Seminole State College of Florida
Altamonte Springs Campus