The calculated distance (air line) between Platnirovskaya and Ryazanskaya is approximately 32 miles respectively 51 kilometers.
By car or train, the actual journey to Ryazanskaya is certainly longer, as only the direct route (as the crow flies) between Platnirovskaya and Ryazanskaya has been calculated here.
Air line (approximately)
51 kilometers
28 nautical miles