Chloe drives from her house to her grandmas house 48 miles away in an hour and 12 minutes. How fast was she driving on average?

40 miles per hour

Step-by-step explanation:

change hours and minutes to hours

12 minutes = 12 minutes * 1 hr / 60 minutes = 12/60 hrs

12/60 = 1/5 =.2 hours

1 hours 12 minutes = 1.2 hours

48 miles in 1.2 hours

48/1.2 = 40 miles/hour