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