a runner in marathon passes the 5 mile mark at 1 o'clock and the 20 mile mark at 3 o'clock .what is the runners average speed during this time period?
avg speed=distance/time=(20-5)/(3-1)= 7.5 miles/hr
That is close to the qualifying time to run in the Boston Marathon (26miles/3.5 hrs (7.5mph)....adjusted for age and gender)
7.5mile
To find the runner's average speed, we need to determine the total distance covered and the total time taken.
The distance between the 5-mile mark and the 20-mile mark is 20 - 5 = 15 miles.
The time taken to cover this distance is 3 - 1 = 2 hours.
Therefore, the runner's average speed during this time period is:
Average speed = Total distance / Total time
Average speed = 15 miles / 2 hours
Average speed = 7.5 miles per hour
To determine the runner's average speed during this time period, we need to calculate the total distance covered and divide it by the time taken.
In this case, the runner passes the 5-mile mark at 1 o'clock and the 20-mile mark at 3 o'clock. So, the runner covered a distance of 20 - 5 = 15 miles in 3 - 1 = 2 hours.
To find the average speed, we divide the total distance by the time taken:
Average Speed = Total Distance / Time
Average Speed = 15 miles / 2 hours = 7.5 mph
Therefore, the runner's average speed during this time period is 7.5 miles per hour.