Kevin is taking a 600-mile trip, traveling at a rate of 50 miles per hour. How much faster must he travel to decrease his travel time by 4 hours? Let's be accurate as possible.
First find his current travel time 600 miles / 50 miles per hour = 12 hours. 12 hours - 4 hours = 8 hours desired travel time. 600 miles / 8 hours = 75 miles per hour. 75 miles per hour - 50 miles per hour = 25 miles per hour faster.
The answer: 25.