The calculated distance (air line) between Tanout and Guidan Roumdji is approximately 173 miles respectively 278 kilometers.
By car or train, the actual journey to Guidan Roumdji is certainly longer, as only the direct route (as the crow flies) between Tanout and Guidan Roumdji has been calculated here.
Air line (approximately)
278 kilometers
150 nautical miles