Question

Mario ran 10 miles in 1 hour and 15 minutes (1.25 hours). What was his average speed?

1. 12 miles per hour
2. six miles per hour
3. eight miles per hour
4. 10 miles per hour

Answer 1

Mario's average speed was 8 miles per hour, which is calculated by dividing the total distance of 10 miles by the total time of 1.25 hours.

Step-by-step explanation:

The student is asking to find Mario's average speed when he ran 10 miles in 1.25 hours. To find the average speed, we use the formula: Average Speed = Total Distance / Total Time. In this case, we have:

• Total Distance = 10 miles
• Total Time = 1.25 hours

Calculating the average speed, we have:

Average Speed = 10 miles / 1.25 hours = 8 miles per hour.

So, Mario's average speed was 8 miles per hour. This means the correct answer is option 3.

To double-check the reasonableness of this answer, if we compare it to a situation where if you travel 10 miles in a third of an hour (20 minutes), you would expect to travel three times that far in a full hour, i.e., 30 miles. Since 10 miles were actually covered in a longer time than 20 minutes, it's logical that the speed is lower than 30 miles per hour, making an average speed of 8 miles per hour a reasonable result.

Answer 2

It is eight miles per hour