It takes a runner 3 h, 28 min, 33 s to run a marathon. If the distance of a marathon is 42.2 km, what is the average speed of the runner?
28 min=28/60 of a hour
33 sec=33/3600 of an hour.
add these to 3hr.
avg speed=42200m/timeabove
Runner A is initially 2.4 km west of a flagpole and is running with a constant velocity of 7.2 km/h due east. Runner B is initially 8.6 km east of the flagpole and is running with a constant velocity of 7.6 km/h due west. What will be the distance of the two runners from the flagpole when their paths cross?
It takes a runner 3 h, 33 min, 27 s to run a marathon. If the distance of a marathon is 42.2 km, what is the average speed of the runner
To find the average speed of the runner, we need to divide the distance covered by the time it took. Here's how you can calculate it:
1. Convert the time taken to seconds:
- 3 hours = 3 * 60 * 60 = 10,800 seconds
- 28 minutes = 28 * 60 = 1,680 seconds
- 33 seconds
Total time = 10,800 + 1,680 + 33 = 12,513 seconds
2. Divide the distance covered by the time taken:
Average speed = Distance / Time
Average speed = 42.2 km / 12,513 seconds
3. Convert the average speed to km/h:
- Convert seconds to hours by dividing by 3,600 (60 minutes * 60 seconds).
- Divide the distance (km) by the time (hours).
Average speed = (42.2 / 12,513) * 3,600
4. Calculate the average speed:
Average speed = 12.784 km/h
Therefore, the average speed of the runner is approximately 12.784 km/h.