The calculated distance (air line) between Tulu Bolo and Debre Birhan is approximately 114 miles respectively 183 kilometers.
By car or train, the actual journey to Debre Birhan is certainly longer, as only the direct route (as the crow flies) between Tulu Bolo and Debre Birhan has been calculated here.
Air line (approximately)
183 kilometers
99 nautical miles