The calculated distance (air line) between Ruppichteroth and Bochum-Hordel is approximately 47 miles respectively 76 kilometers.
By car or train, the actual journey to Bochum-Hordel is certainly longer, as only the direct route (as the crow flies) between Ruppichteroth and Bochum-Hordel has been calculated here.
Air line (approximately)
76 kilometers
41 nautical miles