The calculated distance (air line) between Yŏch’im-dong and Paek'ak is approximately 83 miles respectively 134 kilometers.
By car or train, the actual journey to Paek'ak is certainly longer, as only the direct route (as the crow flies) between Yŏch’im-dong and Paek'ak has been calculated here.
Air line (approximately)
134 kilometers
73 nautical miles