The slopes of most cinder cones are usually about 30 degrees because that is the angle of repose, which is the slope at which the loose cinder can stand in equilibrium.
The cinder cones vary significantly in height, from just a few meters of height to few hundred meters.
They are numerous around any volcano, and lava can come out of them or may flow below them.
I think you need to reread you question. If you copied and pasted, something probably didn't copy.
Population density is the number of people per unit of area. Usually measured by how many people are in a square mile or square kilometer.
Hope this helps!!
A unit of astronomical distance equivalent to the distance that light travels in one year .....and because it is the fastest way to measure in a very long distances for example earth to other far away planets
