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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.

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15y ago

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