Respuesta :
Answer is 20 miles per hour.
To determine the person's average speed during her commute, we need to calculate the total distance traveled and the total time taken. First, let's calculate the distance traveled during the driving time. Since the person drives for 10 minutes at a speed of 30 mph, we can use the formula: Distance = Speed × Time Distance = 30 mph × (10 minutes / 60 minutes) Distance = 30 mph × (1/6) hours Distance = 5 miles So, the person travels a distance of 5 miles during the driving time. Next, let's calculate the total time taken for the commute. The person spends 10 minutes driving and 5 minutes stopped at red lights, so the total time is: Total Time = Driving Time + Stopped Time Total Time = 10 minutes + 5 minutes Total Time = 15 minutes Now that we have the total distance traveled (5 miles) and the total time taken (15 minutes), we can calculate the average speed using the formula: Average Speed = Total Distance / Total Time Average Speed = 5 miles / (15 minutes / 60 minutes per hour) Average Speed = 5 miles / (15/60) hours Average Speed = 5 miles / (1/4) hours Average Speed = 5 miles × 4 hours Average Speed = 20 mph Therefore, the person's average speed during her commute is 20 miles per hour.
