21 m/s
Average speed = 200 meters per 25 seconds It can also be written as 8 meters per second
he walks back
The total distance covered by the man is 1 meter (walking at 1 m/s for 1 minute) + 3 meters (running at 3 m/s for 1 minute) = 4 meters. The total time is 2 minutes. Therefore, the average speed is total distance / total time = 4 meters / 2 minutes = 2 m/s.
5
One hour
8minutes
8 minutes
An average of 15 mph.
about 6-7 km/hour
The "average" walking speed of man is 1 to three miles per hour. In a hundred yard dash, man can do 18 miles per hour.
The International Space Station has an average orbital speed, relative to the earth, of 27700 kilometres per hour. So the crew of the ISS could cover approx 666,000 km per day.