* Speed is calculated by dividing the distance traveled by the time it takes.

* In the first scenario, you travel 10 meters in 1 second, so your speed is 10 meters/second.

* In the second scenario, you travel 20 meters in 2 seconds. Your speed is still 20 meters / 2 seconds = 10 meters/second.

Even though you travel a longer distance in the second scenario, you take twice as long, resulting in the same speed.