1. Convert minutes to seconds:

* There are 60 seconds in a minute, so 12 minutes is equal to 12 * 60 = 720 seconds.

2. Calculate speed:

* Speed is calculated by dividing distance by time:

* Speed = Distance / Time

* Speed = 18 meters / 720 seconds

* Speed = 0.025 meters per second

Therefore, the speed is 0.025 meters per second.