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?
Step-by-step reasoning:
25
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.

.

Thus, the answer is 25