To find the average speed in meters per second (m/s) for a given distance and time, we need to convert the distance and time to the appropriate units and then use the formula:
Average Speed = Distance / Time
First, let's convert the distance from kilometers to meters:
Distance = 10 km × 1000 meters/kilometer Distance = 10,000 meters
Next, let's convert the time from 1 hour and 20 minutes to hours:
Time = 1 hour + (20 minutes / 60 minutes per hour) Time = 1 + (20/60) hours Time = 1.33 hours
Now we can calculate the average speed:
Average Speed = 10,000 meters / 1.33 hours
However, to convert hours to seconds, we need to multiply by the conversion factor:
1 hour = 3600 seconds
Average Speed = (10,000 meters / 1.33 hours) × (1 hour / 3600 seconds) Average Speed ≈ 7.52 m/s (rounded to two decimal places)
Therefore, the average speed of a distance of 10 km in 1 hour and 20 minutes is approximately 7.52 m/s.