chen rode his skateboard 3 3/4 miles in 3/4 of an hour what was his average 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 = 3.75 miles
Time taken = 3/4 hours = 0.75 hours
Average speed = Distance / Time
Average speed = 3.75 miles / 0.75 hours
Average speed = 5 miles per hour
Therefore, Chen's average speed was 5 miles per hour.