The calculated distance (air line) between Myrnyi and Kryvyy Rih is approximately 81 miles respectively 131 kilometers.
By car or train, the actual journey to Kryvyy Rih is certainly longer, as only the direct route (as the crow flies) between Myrnyi and Kryvyy Rih has been calculated here.
Air line (approximately)
131 kilometers
71 nautical miles