What is the average speed 3hour's 45min's to travel 180 miles?
speed = distance / time.
In travelling over a distance, the speed may vary. The average
speed is the constant speed that covers the given distance in the
given time.
First convert the time to hours and fractions of hours:
45min = 45/60 hrs = 0.75hrs
3hr 45min = 3.75hrs
Now divide:
average speed = 180 / 3.75 = 48 mph.