To fill: The average speed if travel distance is 100 miles in 2 hour.
Average speed is .
Total distance travelled is 100 miles and total time taken to travel that distance is 2 hour.
Average speed of any body is the ratio of total distance covered by the body to the total time taken to cover that distance.
Substitute 100 for total distance travelled and 2 hour for total time taken in equation (1)
Thus, the average speed is .
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