Answer : The average speed of the roller coaster is, 33 mile/hr
Explanation :
Average speed : It is defined as the ratio total distance to total time.
Formula used :

As per question,
Total distance traveled = 1.265 miles
Total time taken = 2.3 min = 0.038 hr (1 hr = 60 min)
Now put all the given values in the above formula, we get:


Therefore, the average speed of the roller coaster is, 33 mile/hr