What kind of accuracy can the use of RFID give in a location problem?

Question

Geolocation

An interesting question for me, I think for the community on the toaster it is not so difficult.
Let there be a task - to determine the exact location of an object in space at a distance of 30 cm. This problem can be solved using any of the popular technologies: we take three spaced antennas and, based on the signal propagation speed, determine the distance from the propagation point, to each antenna itself - we get a vector. You can use a lot of things to solve the problem, but I'm interested in RFID.
Simple examples from the fields:

• cars in the parking lot (whether they arrived and on what site they are standing),
  
• a group of objects in a basket or in drawers (notebooks, pens, keys),
  
• *place for your fantasy*
  

How accurately can (order: meters, centimeters, millimeters, ...) using RFID determine the location of the tag? In general, can they already use RFID in similar tasks (it would be cool to look at examples)?
I read about the technology, and for example, I'm interested in the FCC waveband (902-928 MHz) or ETSI (866-868 MHz), UPD2 : however, the minimum tag reading distance for it, based on the article, is a meter, which is not suitable, according to to this, options with a different frequency are being considered, it is not yet clear which one.
UPD1 . Yes, the main thing is that the tags are passive, active, this is a father, it seems to me that tea is bad manners.

Answer 1

meters
in systems in stores for a long time,
in my opinion, up to two meters + crossing the perimeter (well, it's easy)