The calculated distance (air line) between Jardas al ‘Abīd and Tobruk is approximately 174 miles respectively 280 kilometers.
By car or train, the actual journey to Tobruk is certainly longer, as only the direct route (as the crow flies) between Jardas al ‘Abīd and Tobruk has been calculated here.
Air line (approximately)
280 kilometers
151 nautical miles