What happened to the velocity at 30 centimeters down the ramp compared to 10 centimeters down the ramp ?

The velocity at 30 centimeters down the ramp will be considerable higher compared to 10 centimeters down the ramp.

Explanation:

It is a non lineair problem, since the speed is increasing while rolling down the ramp.

We will expect therefore, that the graph of speed (on the y-axis) and position (on the x-axis) will NOT be a streight line.

if you could plot some values given, with speed (on the y-axis) and position (on the x-axis), then you could draw a smooth line through them, which would give an estimate of all points in between them.

What can be stated with only so limited information, is that the velocity at 30 centimeters down the ramp will be considerable higher compared to 10 centimeters down the ramp.