chen rode his skateboard 3 3/4 miles in 3/4 of an hour what was his averge speed in miles per hour
To find the average speed, we need to divide the total distance traveled by the total time taken.
Distance traveled = 3 3/4 miles
Total time taken = 3/4 hour
Average speed = Distance / Time
Average speed = (15/4) / (3/4)
Average speed = (15/4) * (4/3)
Average speed = 15 / 3
Average speed = 5 miles per hour
Therefore, Chen's average speed was 5 miles per hour.