### Home > PC3 > Chapter 5 > Lesson 5.1.1 > Problem 5-11

5-11.

Driving from Cleveland to Washington, D.C., Ernie averaged

How fast was Ernie going after one hour?

Ernie averaged

mph for the first hours. Does this mean he drove at a constant rate? What was Ernie’s average rate for his entire

-hour trip? average speed

total distance / total time

Determine Ernie's total distance from the given information.

Then divide by the total time (hours).