To calculate the time it takes to travel a certain distance at a specific speed, you can use the formula:
Time = Distance ÷ Speed
In this case, the distance is 4 miles and the speed is 30 miles per hour. Plugging those values into the formula gives:
Time = 4 miles ÷ 30 mph = 0.1333 hours
To convert hours into minutes, multiply by 60:
0.1333 hours × 60 minutes/hour = 8 minutes
So, it takes approximately 8 minutes to travel 4 miles at a speed of 30 mph.