The calculated distance (air line) between Kahna Nau and Tarn Tāran is approximately 33 miles respectively 54 kilometers.
By car or train, the actual journey to Tarn Tāran is certainly longer, as only the direct route (as the crow flies) between Kahna Nau and Tarn Tāran has been calculated here.
Air line (approximately)
54 kilometers
29 nautical miles