The calculated distance (air line) between Arivonimamo and Ambatondrazaka is approximately 115 miles respectively 185 kilometers.
By car or train, the actual journey to Ambatondrazaka is certainly longer, as only the direct route (as the crow flies) between Arivonimamo and Ambatondrazaka has been calculated here.
Air line (approximately)
185 kilometers
100 nautical miles