The calculated distance (air line) between Sv. Ana v Slov. Goricah and Kočevje is approximately 84 miles respectively 135 kilometers.
By car or train, the actual journey to Kočevje is certainly longer, as only the direct route (as the crow flies) between Sv. Ana v Slov. Goricah and Kočevje has been calculated here.
Air line (approximately)
135 kilometers
73 nautical miles