The calculated distance (air line) between Pervomayskoye and Kryvyy Rih is approximately 153 miles respectively 246 kilometers.
By car or train, the actual journey to Kryvyy Rih is certainly longer, as only the direct route (as the crow flies) between Pervomayskoye and Kryvyy Rih has been calculated here.
Air line (approximately)
246 kilometers
133 nautical miles