If the Large Hadron Collider is 27 km long, and visible light travels 3.0 × 108 m/s, how long does it take a ray of visible light to travel from one end of the collider to the other?

To find the volume of an object with a graduated cylinder:
Take the graduated cylinder and fill it with water to a certain level.

Place the object you are trying to measure in the cylinder.

The level of water will rise to a certain point.

The level of water with the object in it minus the original level will give you the volume.

To just measure the volume of a liquid in the cylinder:
Pour the amount of liquid into the cylinder

Have the cylinder on a flat surface and look at the level of liquid at eye level

The volume of liquid will be where the bottom of the curve of the liquid level is. Look at the unit measurement and that will give you the unit of volume.

If this is what what it was asking I’m sorry