The calculated distance (air line) between Ranam and Sŭngjibaegam is approximately 56 miles respectively 90 kilometers.
By car or train, the actual journey to Sŭngjibaegam is certainly longer, as only the direct route (as the crow flies) between Ranam and Sŭngjibaegam has been calculated here.
Air line (approximately)
90 kilometers
49 nautical miles