Sue ran the first 12 miles of the 24-mile Fun Run in 72 minutes. Her rate decreased by 2 miles per hour in the second half of the race. How long did it take Sue to run the second half of the Fun Run?please show how to do this

Answer:90 minutes or 1.30 hoursStep-by-step explanation:In 72 minutes, Sue ran 12 miles per hourIn 1 minute, Sue ran 12/72 miles per hourIn 60 minutes, Sue ran (12/72)*60 miles per hour= 10 miles per hourRemaining miles after completing 12 miles in 72 minutes = (24-12) = 12 miles.If the mileage decreases to 2 miles per hour, he will now run = (10 - 2) = 8 miles per hour.Now, 1 hour = 60 minutesSue can run 8 miles in 60 minutesSue can run 1 miles in 60/8 minutesSue can run 12 miles in (60/8)*12 minutes= 90 minutes or 1.30 hours