human
To make 3 km, Ben walked for 2 hours. Continuing at the same speed, how much time in minutes would it take him to travel 12 km?
assistant
How much time will it take him to travel 12 km? ** We have 12 km / 3 km = <<12/3=4>>4. So, the distance covered in 12 km is 4 times greater than 3 km. The time taken will also be 4 times greater.
How many hours did it take him to travel 3 km? ** So, 2 hours x 4 = <<2*4=8>>8 hours.
How many minutes did it take him to travel 3 km? ** We convert the time to minutes: 8 hours * 60 minutes/hour = <<8*60=480>>480 minutes.
#### 480