prompt: 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?
messages.content: 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?
messages.role: user
messages.content: First find his current travel time 600 miles / 50 miles per hour = <<600/50=12>>12 hours.
  12 hours - 4 hours = <<12-4=8>>8 hours desired travel time
  600 miles / 8 hours = <<600/8=75>>75 miles per hour.
  75 miles per hour - 50 miles per hour = <<75-50=25>>25 miles per hour faster
  #### 25
messages.role: assistant