Question

oliver drove 90 mph of his journey in 1.5 hours and the remaining 120 miles in 3 hours. what was his average speed in the first part of his trip?

Answer 1

Based on the rule, Average speed = change in distance / change in time, we can solve this problem.

The given distance traveled: 90mph
The given time: 1.5 hrs (hours), 3hrs

First, we’ll find the different rates of speed (mph) to average in our second step.

To find the mph for the ‘remaining 120 miles’: 120/3= 40mph

Using the formula above, we know that the average velocity = 90 mph + 40mph/ 1.5 + 3, which simplified evaluates to - 28.9mph