The calculated distance (air line) between Chapayevsk and Krasnyy Yar is approximately 46 miles respectively 74 kilometers.
By car or train, the actual journey to Krasnyy Yar is certainly longer, as only the direct route (as the crow flies) between Chapayevsk and Krasnyy Yar has been calculated here.
Air line (approximately)
74 kilometers
40 nautical miles