The calculated distance (air line) between Pervomayskoye and Yevpatoriya is approximately 43 miles respectively 69 kilometers.
By car or train, the actual journey to Yevpatoriya is certainly longer, as only the direct route (as the crow flies) between Pervomayskoye and Yevpatoriya has been calculated here.
Air line (approximately)
69 kilometers
37 nautical miles