The calculated distance (air line) between Samho-rodongjagu and Hŭngnam is approximately 15 miles respectively 24 kilometers.
By car or train, the actual journey to Hŭngnam is certainly longer, as only the direct route (as the crow flies) between Samho-rodongjagu and Hŭngnam has been calculated here.
Air line (approximately)
24 kilometers
13 nautical miles