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