Answer:
15 cm per minute
We know:
Distance: 30 cm
Time: 2 minutes
We want to find:
x cm per 1 mintue
Work:
Speed is equal to the distance divided by the time, so
30 / 2 = 15 cm per minute
Have a nice day!
I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly.
- Heather