The calculated distance (air line) between Ādīs Zemen and Bahir Dar is approximately 45 miles respectively 72 kilometers.
By car or train, the actual journey to Bahir Dar is certainly longer, as only the direct route (as the crow flies) between Ādīs Zemen and Bahir Dar has been calculated here.
Air line (approximately)
72 kilometers
39 nautical miles