The calculated distance (air line) between Knyazhichi and Rzhyshchiv is approximately 36 miles respectively 58 kilometers.
By car or train, the actual journey to Rzhyshchiv is certainly longer, as only the direct route (as the crow flies) between Knyazhichi and Rzhyshchiv has been calculated here.
Air line (approximately)
58 kilometers
31 nautical miles