The calculated distance (air line) between Sergeyevka and Bol’shoy Kamen’ is approximately 53 miles respectively 86 kilometers.
By car or train, the actual journey to Bol’shoy Kamen’ is certainly longer, as only the direct route (as the crow flies) between Sergeyevka and Bol’shoy Kamen’ has been calculated here.
Air line (approximately)
86 kilometers
46 nautical miles